Malicious PDF — malware analysis report

Static analysis result for SHA-256 c400db22d972c0f2…

MALICIOUS

PDF

71.2 KB Created: 2021-02-16 20:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 57d99e3f4c18ac9d1d3334d0abd6228c SHA-1: 6756ac21f2ffb23870571e1b5b5420583e0e4fa2 SHA-256: c400db22d972c0f23590b3cf16f625974da64f36f7b09745d15477ab5faa9517
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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://baarspo.ru/wix?keyword=burn+notice+wiki+episodes PDF link annotation
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/7950618.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/ieoXJDJ/32889371914.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jjjicjg/85349561131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489237/normal_5ff424e759d7b.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/DzgdEgh/space_run_3_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/c1icChj/emoji_whatsapp_stickers_maker_apk_free_download_iphone.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/dc614932b2.pdfIn PDF document text
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/fapokiwibadaj-mopoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fe7511a119fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_60150aee41c91.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/4810724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5ff01a9593bec.pdfIn PDF document text
    • https://sedapelagug.weebly.com/uploads/1/3/4/1/134109100/jokojilejaxiboruge.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/43292.pdfIn PDF document text
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/teruwobogodewo.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/litaxoba-lupox-foduzezerugamo.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/ciaMhjj/60411224538.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/nopomewegobij/comment_allez_vous_formal_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/vomufurerojasazogu.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_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 5028 bytes
SHA-256: 47f2f3b359c18ae98ac0ececaf8847a408ab6880813ad1d00cb05e9cf926032a
font_01_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 10260 bytes
SHA-256: 550f29c24b52bd93cd22c52e087b51522851a869b885c98cd6e908acb0964079

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