Malicious PDF — malware analysis report

Static analysis result for SHA-256 5271a322978689cc…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 18:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b80aed975c5ece2d0baf6e867ee626f6 SHA-1: d581e7f2ab78d89b8d867466dd4b4935e0fc6269 SHA-256: 5271a322978689cc20d425e554305bea62d620a13df34c873dcb692793c5d1a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lure users into downloading further malicious content or visiting phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=ibps+po+exam+pattern+2018+pdf+download PDF link annotation
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/a9b8e8df30be936ece68c16a6c171d8a/viberiwadeduzeru.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae27ae0a163---83946438279.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/dofabazazap.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d822b1567e0---67104099390.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091003a9d6f7---bixatakasibilevot.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/15019781038.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/siwezivikowob.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/19681294000.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/82544306280.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/a845929e510efcc6a6f948da4e1df603/9542945471.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/1956247392.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/10514041739.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/28769917332.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/34744130464.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/77962601143.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/8nk44uij2o3b9hel9jemncmkr6/9022378199.pdfIn PDF document text
    • http://yanartextil.com/firma/files/43166993763.pdfIn PDF document text
    • http://cga82.com/admin/File/judutovitabuwedigomiluf.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/ed84cb3a51ef8e6c3e6998ed3578fca3/nusarexor.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/kusotavevogosigavajus.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_off0000c020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC020 17688 bytes
SHA-256: b7a4454f6af6c3fc167474dc665bb8a30695140d7f9d305d900d38b73b46797c
font_01_sfnt_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 11348 bytes
SHA-256: 6c696d553e1c5ec681c0ed81e1d26c09f1299df7a37ee5168993119eddef4edc
font_02_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1