Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfd75d97d1e36a1…

MALICIOUS

PDF

79.1 KB Created: 2021-03-11 01:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c1ffd8e0e0e4fc2dc1432c2744787081 SHA-1: 2862d6771fb52eea30d0bd22e7d9af8ab50bfe02 SHA-256: cbfd75d97d1e36a162c9e7dd7e4a454d182aa6e027120f292f77cc357d8724c8
156 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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=hustle+castle+pvp+guide PDF link annotation
    • https://rozonamofo.weebly.com/uploads/1/3/4/7/134751518/jinetiwajarur.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/mimepifevepawosedom.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/0f953caeeaa811c.pdfIn PDF document text
    • http://excellent-spb.ru/xadub711uv.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/3814393.pdfIn PDF document text
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/dinakisorufuj.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/aTjIjao/80605960197.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/rejevijawijef-lajuripezi-ravax-niveker.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/xesuvizi.pdfIn PDF document text
    • http://monoga.space/570395739764tola.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/6933430.pdfIn PDF document text
    • https://lapomuxonadaxo.weebly.com/uploads/1/3/4/5/134584049/butubuvud.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/eJhi8cK/free_printable_online_grocery_list_maker.pdfIn PDF document text
    • http://reawont.online/love_poems_for_your_wife_on_her_birthdayedqcr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bojijavojoxumulesepogato.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/79639599932.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/genius_g750_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/cranial_cavity_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/kisamanafup.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/mokiwidazivonovisaxogemo.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/alight_motion_apk_mod_2._3._1.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 5168 bytes
SHA-256: 5e81dc9f8e0e79742c93026ca7fe17ef4ec6679947db1681ba689c706da3be95
font_01_sfnt_off00010bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBA 10468 bytes
SHA-256: 34dc98bb44231919c82fabcb615d1ba18ae9777f4f41f5c9fdae97918e870861

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