Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d07516fefd688fd…

MALICIOUS

PDF

70.7 KB Created: 2021-02-06 05:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af2c32236a6dfa549bd9da72a744968e SHA-1: affa7111869539d2788ed2dcad2dbc4a7e0419ef SHA-256: 0d07516fefd688fd2d585bf362bad627bb255f9f0c37526a0d4c50120876a456
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to 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 malware distribution. While no scripts were explicitly extracted, the PDF structure and external link behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=lagu+balungan+kere+xena+xenita+koplo PDF link annotation
    • http://jewuzalozegeso.iblogger.org/fire_mage_leveling_guide_vanilla.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/h5xSyjd/dizazasawozomij.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/hcKcheb/troll_face_quest_horror_3_level_16.pdfIn PDF document text
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/270951.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/bedexulojararikef.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/vax7heZ/79191349863.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/igicujh/jimubig.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/zepifudoxapo/appcleaner_mac_free.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/tusojiwanub.pdfIn PDF document text
    • http://fejusadifidexi.epizy.com/39765994776.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/flocabulary_main_idea_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/57388511733.pdfIn PDF document text
    • http://fegifujeviba.epizy.com/92674598046.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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 5024 bytes
SHA-256: 5f89fdb6897a83dee8bd1e5390a60bacd591f86a12f3a94e8ea8f173bf5fe2b1
font_01_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 10060 bytes
SHA-256: 61d8fad9c71ea3d2e653c02e288a481f4569d670478590fe64c106056f48c57c

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