Malicious PDF — malware analysis report

Static analysis result for SHA-256 60385f7ed5cc7dc4…

MALICIOUS

PDF

71.4 KB Created: 2021-01-25 22:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: db06b05fcf45ebc4055e0387b4a131a5 SHA-1: 91471f0484b5617bca09548b124940e6cb1eb684 SHA-256: 60385f7ed5cc7dc4ffb7e5075100c00368643c93e0f9e1f45c11ec2e41ec9507
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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
  • 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://jottigo.ru/123?utm_term=bob+rohrman+subaru+lafayette+indiana PDF link annotation
    • https://zitenimed.weebly.com/uploads/1/3/1/3/131383388/tipodunejuv.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ggejbRR/zatepanatog.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/ehjifei/new_pop_rock_music_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/cjavXY1/iron_maiden_trooper_bottle_opener.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/y7kidgd/fight_night_live_updates.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/siaQpiA/grandma_beer_pong_trick_shots.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/ghdhcgj/planet_pizza_menu_stamford.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/7019c3.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/4668270.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/giaWShd/duetto_spider_price.pdfIn PDF document text
    • https://vixozomaregug.weebly.com/uploads/1/3/1/3/131398278/semowolixujemu-juxanuzefarefow.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/hggjjdj/bexufetasinojazelen.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/JMhgUjc/relokeniraturebemovabo.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/powidugivexotajitita.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/ejbpjac/motosport_motorcycle_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juxudawalugevop.epizy.com/66894895821.pdfIn PDF document text
    • http://noxudovo.rf.gd/wasovavuxikomifaboxezeb.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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 5440 bytes
SHA-256: 21df40e8da58fa8f90729591e770c332f8e153ef529b8a6e986828224136d376
font_01_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 10196 bytes
SHA-256: 71d277b2c95579260981cbff1bdd4c087811a295bc82b9a253c8714a29a8ab08

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