Malicious PDF — malware analysis report

Static analysis result for SHA-256 694272eaa78c7b86…

MALICIOUS

PDF

102.6 KB Created: 2021-08-07 14:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9c3ccef789bd4ca6d2255158081873dc SHA-1: 71cc07500a5968b5ecd60095c64c9c6e5db171cb SHA-256: 694272eaa78c7b867fbb8117e1c8db3f4e2db051a05e914ffa38214aa93cd2f8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which appear to be WordPress installations. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=winrar+32+bit+free+download+for+windows+7+filehippo PDF link annotation
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d44768ea09---42786943923.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b08ee34ac---rumipax.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/30034061464.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/30881645514.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/mazatixap.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/24637250686.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cea613b220e---59916428804.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/nepopot.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/sawasawekavuvunubumaga.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fhgq5d9v8e97h1t85u5gt4bl57/28487830039.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/5546013542.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/zuzonagolo.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/4ed37ff9e90ba63803d625defb3bf271/zowosopifuvexafixorone.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/misaraxuj.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/13389901933.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/11649404736.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/tilonuxufuwexufed.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/6o3pvaag4t7le9tc59ijerf1t7/58006464439.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d15dbfc83533d5523aac4999ca13de9e/15463406266.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/jovanevediguwe.pdfIn PDF document text
    • http://gloria-eurex.com/24529850525.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/8cc3d44ea09a8caf51d81ea09af4cde0/fezawezukurovidofufusigu.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/6804465499.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b8f90702---jelerixomomiwog.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_off00012b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001437f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437F 17588 bytes
SHA-256: d42af3cfb0592e9d29dd70261eb16cc949596da9127ab776fa2f72149127ebe0
font_02_sfnt_off00017141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17141 11156 bytes
SHA-256: 6600a4c3330f4b46f0ae49c671c61a8e3b792fe91c7dec49b0d824f190d21ae3

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