Malicious PDF — malware analysis report

Static analysis result for SHA-256 014e482e7037b476…

MALICIOUS

PDF

91.9 KB Created: 2021-08-08 14:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b61581a50644a66593c9fac3df56d90 SHA-1: 4a8f415d2e3db13a64a2b673cef2ab26774c18c8 SHA-256: 014e482e7037b476dbf11e8e9d1fb4aaec71ef8c652754ae63502089d2901100
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on such sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely to redirect users to phishing or malware distribution sites. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://allytemp.ru/uplcv?utm_term=exercices+droites+parall%C3%A8les+et+perpendiculaires+cm2+%C3%A0+imprimer PDF link annotation
    • https://stvorki.ru/files/file/12550320127.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087f8d04020e---rozodomafazoxizuw.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/f95090c81f401753d7b85f497899f19b/58663055072.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/51268736672.pdfIn PDF document text
    • https://kristinanamaste.eu/files/rigulitajeredafuberaruno.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/55579823585.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/14533905116.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/28284908275.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/jitewifiwexijebofe.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160798795a2a42---pezabegolakavejasodobeno.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c18fb5b2314---labivixowowamaribemevexus.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/58461805339.pdfIn PDF document text
    • http://poorclarescork.ie/images/50689649621.pdfIn PDF document text
    • https://le27.fr/docs/file/mizigole.pdfIn PDF document text
    • http://navigator-33.ru/media/file/90108903873.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/xaroredodezikakiliwub.pdfIn PDF document text
    • https://ancoraeducacion.com/images/93483431711.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/60983514757.pdfIn macro / runtime command snippet
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a0efb8fa8---24973504498.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090960242677---70434286475.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/842a4ff47658f89d8ecb3f1399893895/90821492458.pdfIn PDF document text
    • http://thegioinoithatcamranh.com/media/ftp/file/33656901621.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37ae2ecc8---70812549960.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081540a64207---vujovelatadi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 18772 bytes
SHA-256: 881572369511a2110d92bf37209b1e8a2b93ea64a861d6cdf3b5e6f872b191be
font_01_sfnt_off00011471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11471 11320 bytes
SHA-256: fac01c0b7b83a8fc4518bcb5d3f8e9229b97244f56d2684a948c066cb54c0aee
font_02_sfnt_off00012e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5B 16556 bytes
SHA-256: f13ea7e8b74ccbe86e01bfe4d5efde6fa2f9fef470e4f57354e2d9ba12a588cb
font_03_sfnt_off00014509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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