Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00db87ee8f0147b…

MALICIOUS

PDF

70.3 KB Created: 2021-02-08 17:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9218071d8af8e9c5f816cd7f06f46a71 SHA-1: 83104d42c6d679faa5e557d05e8278dce51d7e25 SHA-256: d00db87ee8f0147bd2750d4b5c4472c9fae20066e73c79b778f16c62d02c0861
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of JavaScript, though obfuscated, further supports malicious intent by enabling dynamic content loading or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/aws?utm_term=twitter+lights+out+android PDF link annotation
    • http://faceit.su/213751422353imx4.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/Syhff36/38176887345.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/subterfuge_make_a_sentencevch1j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_60007c7f44702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_5fe571fd3f9a5.pdfIn PDF document text
    • http://avit0.cc/57649974474yq6v7.pdfIn PDF document text
    • http://sobakin.space/98253592694qeona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5fe036cd24d44.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/smajeXL/bemugaxox.pdfIn PDF document text
    • http://tohld.in/414734709921uq3.pdfIn PDF document text
    • http://sreview.online/change_text_pythonlmjyr.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ijkyOsP/shattered_glass_movie_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tekunobujolid.epizy.com/57540640624.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/imitation_girl_parents_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85D 5008 bytes
SHA-256: 6a6e0c857cb4c73dc10f7b15c43abf4c4860ed0e466a71c5e54bc9650aab44ef
font_01_sfnt_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 10852 bytes
SHA-256: b85ada2efb75dabc5e069151abeb8655b8133840e6c873e86515d77794aec755
font_02_sfnt_off0000fe89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE89 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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