Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae81693ed0085fbf…

MALICIOUS

PDF

77.2 KB Created: 2021-05-15 23:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 775594c7962193716940a1a1e79b64f0 SHA-1: 5a8a26f3d8a3a921fffcdfc8ef1e497d94b87995 SHA-256: ae81693ed0085fbf5580093eb6b118fb84202c1b86471764a9e754ab547463bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9357

Heuristics 5

  • 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
  • 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://dugedepap.ru/strik?utm_term=a+first+look+at+communication+theory+8th+edition+citation PDF link annotation
    • http://vaxunugaso.22web.org/79090627519.pdfIn PDF document text
    • https://cdn.sqhk.co/kabutijefix/UnhMlNx/3047185381.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/gdOjjje/scary_killer_escape_house_horror_mod_apk.pdfIn PDF document text
    • http://gayerkan.com/41782787805w3ihx.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/5BeicNN/fastest_way_to_max_out_shooting_badges_2k20.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://sewonmedix.ru/672033113201j54i.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/eNW6geQ/good_humor_ice_cream_sandwich_nutrition_information.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/idjhlfK/wwe_battlegrounds_roster_overalls.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/gjaJr5S/xiwijepokusadakip.pdfIn PDF document text
    • http://tojokepolosuku.iblogger.org/lulu_support_guide_s9.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/6icbNjb/talking_pierre_the_parrot_apk.pdfIn PDF document text
    • http://bakofutemuxasog.iblogger.org/vivowumawamigonetez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferumovixugixu.epizy.com/traduire_document_anglais_en_francais_gratuit_en_ligne.pdfIn PDF document text
    • http://latarugumajovi.epizy.com/34370514962.pdfIn PDF document text
    • http://koxowasone.epizy.com/7638897138.pdfIn PDF document text
    • http://ronopijitol.rf.gd/2005_honda_odyssey_stock_tire_size.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 5612 bytes
SHA-256: cf8b6114523856e2f482e6117ef4bff3e441dde308fa0062005d16114dab16a0
font_01_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 4120 bytes
SHA-256: 645fde924ac789a78787afc4ff8fa19977be534e83ac58d6f80fd8432c29050b
font_02_sfnt_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 10448 bytes
SHA-256: 3a2613cf7354f4e2b1b8bf6a678b3afefa5f6332da4bf851d80292beea997028
font_03_sfnt_off000119b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B7 16548 bytes
SHA-256: 5a9a389329e2f98cbb6a38ba9676eecd4f71a8fdfb2d431e10a3a9b88aecfee4

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