Malicious PDF — malware analysis report

Static analysis result for SHA-256 e499322d789731a3…

MALICIOUS

PDF

78.0 KB Created: 2021-09-03 20:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eaba8a55e5ac3a4638c85d2655073ab2 SHA-1: eda96ec2e1c12fab9de9e59ae3101cd49a45239d SHA-256: e499322d789731a396947bb8acda68e66ed9728214161d9f1925cae7b710edb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress instances or disposable domains, suggesting a phishing or malware distribution campaign. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=introduction+to+machine+learning+notes+pdf', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=introduction+to+machine+learning+notes+pdf PDF link annotation
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e836f6b27d6b157cd2d3549c7c7a6170/febasexubuf.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/36388679025.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/45418842845.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/fec602400f9cfd4d82aebe304c1090d9/biwitajon.pdfIn PDF document text
    • http://hainfelderteich.at/ruwurenatimevege.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/1133atft3nsm170v9j1kqandg1/dedowobarufurosi.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/71853955709.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/50505565817.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/fitupufi.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/25087140435.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/26686272887.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fd9ee2b8758ed6b0511c2900e0032e50/93775747598.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/8f2ab99e814befce32a4833e58f1c64b/12278714598.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae9e451276---buvosepadariwavi.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/81257076222.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/gexizugas.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ochjskisiqbc8bmpbfs703i6b3/xofedebazefu.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16131a1a859b34---jadevutolip.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cf88c5d300---tudurinutizelatetowok.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775ec223e23---motabubadidun.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/23843413289.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/49847264628.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/890ebeed1328a1b223c79da037fe8e16/1406890237.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/69489696341.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_off0000c97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 18064 bytes
SHA-256: 418310e09b28f4f2cfa8d135835feab150bac511bb6a7efb2be09cc7481766f5
font_02_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 11120 bytes
SHA-256: a6015e780ddedf5e266b2efdc4a0ac12bcf27ebf7a2b2a7f0a2f087d0cea74f6

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