Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2a2de459396bc1…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 23:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7205fa269e2fdccd61d1bc98cad4c860 SHA-1: 45524356433c7b46abb244f647d48668ce42b689 SHA-256: 9d2a2de459396bc163b0feb8f8608fcdd9a4ed9c1523d1f6dd38fce82b4ec7c0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and the heuristic firings suggest it is part of a phishing or malware distribution campaign. No scripts were extracted, but the presence of multiple malicious URLs strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://ketchas.ru/uplcv?utm_term=kiss+full+movie+online PDF link annotation
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613252e6c2e69---36227869268.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/mosexupoga.pdfIn PDF document text
    • http://profstil.az/userfiles/file/ziwuxalidazupereluve.pdfIn PDF document text
    • http://rld-carbon.ru/file/gotulibelewomesulexo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313b2c6db93---nefuzosemetonob.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/texaxinep.pdfIn PDF document text
    • https://ibextrail.com/editor-images/pafudujugapafif.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/mexugimavejodalir.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/87133516847.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/rakavorisusir.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/76734686259.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/fejafe.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/63404387033.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/getijolumotozedefen.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/46444382486.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/rojobefokovet.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/pazepejebejuvigusesupiduf.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0f4278d73a1326fc459c74062a7fec53/40190717016.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/11449081789.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/lesasiveverodan.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109020837559563.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/nafinutobalamopifokenij.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/nokotige.pdfIn 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_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 18316 bytes
SHA-256: 7c9fc496436fe7edaafde44b06bd06c099ea97ac1a60623e1bcf68b37b95feb9
font_01_sfnt_off00011fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 10172 bytes
SHA-256: a6bb4e89b675cb2f068497fcd728b819f1002c606f3e44a2783e0a47da9fbf08
font_02_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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