Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc019d9b14fbced…

MALICIOUS

PDF

91.2 KB Created: 2021-09-09 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cdbc907ca7a5c5daf0ab55df94f18012 SHA-1: 08bd2da4c64c2a29d9fa78b6a9a5e0330647cdfd SHA-256: 0fc019d9b14fbcedf1c89ebb9c186360337a0e9c15886e3535b850edf2fab3f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous URLs that point to compromised WordPress uploads and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=period+3+group+1 PDF link annotation
    • https://healthtecindia.com/userfiles/file/rinonugavizofipod.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/25560715892.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d9c602bb1f8ce86f2aa4bfb239c27124/91786850285.pdfIn PDF document text
    • https://phukienbep.net/media/files/zubapiwigodutoravan.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/botimarudunugige.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/68251705202.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314a8b1c0e3---gaxinibiziwutef.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/rubiginan.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/32409828950.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/fitekadupolijij.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/9932776872.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/49071753508.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133db429eb82---17395711521.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/zazarabebi.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/xedoleritokatasib.pdfIn PDF document text
    • http://dmkert.hu/files/file/pidawa.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/42509852732.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138a44454646---binirazodagipogoxo.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/60923960013.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/notoxamisokez.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/xowawodezubemo.pdfIn PDF document text
    • http://dejede.com/userfiles/file/84627268415.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/68297642160.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/25258623666.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/17259215281.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_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 10312 bytes
SHA-256: 93fc370a7bb66da7d6de24952f4e8d36bd0698c3e5f093d4686e1e42e2bab7a5
font_01_sfnt_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC7 19376 bytes
SHA-256: 8711d9f0b1442ee48d486c30bdadd3646dc30a47965233311ed7925ab8a015ec

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