Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c29a6d09d468033…

MALICIOUS

PDF

59.5 KB Created: 2021-09-21 02:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e75b46297b05983774e1113f7da5c551 SHA-1: ef72345ab498ead379f604a0db87a162f25d8804 SHA-256: 1c29a6d09d4680336988b944c5ef87157f21baafc20d8f6845c5129005decf85
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malicious content. The PDF document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather to host links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3864

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://equator-maritime.com/userfiles/file/24893907438.pdf In PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/bp8pg2qic3cedhi24vsoj9v39d/19957204071.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/tusewofeliteboluxuji.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/87658494974.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/92651431875.pdfIn PDF document text
    • http://beiks.info/public/file/64128820729.pdfIn PDF document text
    • https://stormester.no/files/file/37808003769.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/20806308509.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021091714374470554.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/gbd147274s6md3lg29ne9ap1jq/wovab.pdfIn PDF document text
    • http://hanleyresources.com/images/kivofujeniwuruwolipag.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/pogimonunuxigajagukufa.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/vonizunafugufusepeku.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/deruzezupefumise.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/welejik.pdfIn PDF document text
    • https://ratoempat.com/contents/files/kipisozigeturekus.pdfIn PDF document text
    • http://feg.vn/uploads/files/gibitajokimadijenuf.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16135dfd3012c5---zusegab.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/85544902917.pdfIn PDF document text
    • https://buyafranchise.org/files/files/62787889437.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/fumimiva.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/majimapitoxex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+cast+from+android+to+laptopPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/51561488981.pdfIn PDF document text