Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5de2a5dc5f8273…

MALICIOUS

PDF

88.7 KB Created: 2021-09-04 17:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2de36570d89f2de8aa4166a14335d96c SHA-1: 0b7353c9a6d5d9d054f02b5866d65c4571bea04c SHA-256: ad5de2a5dc5f82733cbd2c3d821cab946f96155c30cd8d71f33bd39eaeabb607
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress upload directories and disposable hosting domains. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

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
  • 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 http://eshop-kocicinadeje.cz/files/file/93608550513.pdf In PDF document text
    • https://promaxsuspension.com/csmimage/file/2106402754.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070664c8068c---zajel.pdfIn PDF document text
    • http://htwy.com/upload/file/73124448800.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a652efc378717e21b99cde5ab2f388b2/76212978370.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/75207892914.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/72799950420.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8dmle2l11fksbhclq3pi734jo4/61514415119.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/2202534301.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/950902199453cae7da21a57b72e15bc8/ximoganoxolijunibe.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/tawuramevatilofudap.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160741edaea137---55141152208.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/qeppuogkngsveu0rdrghc61005/xosetako.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/cd49bf964f7594af45d57fc006c60c7f/zimexekowenetefagow.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/duten.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/22401594004.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812681da8ac---93751805163.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/p8ujagcvna14luqnjcnr2jndv5/pikakivuwuzopikibesizefun.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/zetisemizadukujikemawa.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/zeruzova.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/79371996206.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/84721002142.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/83306284746.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/tawulevo.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/65216055133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mac+life+magazine+pdfPDF link annotation
    • 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_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 20048 bytes
SHA-256: 48d7425e1dde88d78c3af8d364b88e38b14a27fa3247f1e44d0976608cccc7a4
font_01_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 10528 bytes
SHA-256: e0877223437a9e2a575344f57c00e2442a9dd1a5ab20c6825fed54f318f1a4c2
font_02_sfnt_off000146c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1