Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1fbf60c3bc762e…

MALICIOUS

PDF

81.8 KB Created: 2021-07-02 08:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bf59f5fcee2f1c5a46ae63734568e3fc SHA-1: 49bab12d7e93a452f4356885be3b898de753d1f5 SHA-256: 2b1fbf60c3bc762ef184f9ce34918ad0c8feced93ca0801349cba5271e4c6af4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URIs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=basic+anatomy+and+physiology+book+by+n+murugesh+pdf PDF link annotation
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/666bba34f703971a81a5f376881257e8/15519680614.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/95155349686.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/358733c535d9cc3308ea209926c3ab1e/49822291629.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/52983128368.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/d91c4c4a44f4963337c9b5df271b2c7f/35171986218.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160942ef88dced---piremezetaxuvosubiw.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8eb20ced7---tenuludobonof.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085d00d1f4f1---towupaxenetawofigeporovoz.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b56347d0a09---fazixepi.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/7959536464.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/jevipudixojawusalagiruwe.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67eb59c2a---bapelonosebiforizuvaga.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/21cd62d2b8374fddda00a25b22970f3a/segipowesas.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609435381c188---fubapugotemodora.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19b2443df9---mibukut.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/2324cd115a583bdd7d11d8843e6ac9cb/17885161908.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/9s4iok7o2u5qsnk4nmdtft1uum/57087509786.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd287013b1---50931630451.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/69447246040.pdfIn PDF document text
    • https://kuepancong.com/contents//files/remuxikixunikudedijun.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b14f65454ec---zekeked.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/fofovijugulabakeg.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16f73d8a3---51584816776.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/6c0164c6983e36447fd6c04b61323f99/86731526311.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/80115834600.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16085273bbf34d---vigipunaxot.pdfPDF link annotation
    • https://fzclicks.com/demo/files/editor/file/gebizenixekezilafibixudur.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 11564 bytes
SHA-256: 8c659c1a3bb1b74c5fd0ae0ec76ed9360931ea7dc3df1b6b568066136cda7752
font_01_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 17200 bytes
SHA-256: e8c1e3fae3242583eaa6b7bf36d936025f1b0ee38311016370c353807f7b0f09
font_02_sfnt_off00012139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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