Malicious PDF — malware analysis report

Static analysis result for SHA-256 693bd7a18c9ac03e…

MALICIOUS

PDF

74.8 KB Created: 2020-12-21 02:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8eb532236f05eec09f515fb84182d0a0 SHA-1: 512fff0268ba242a38f1457c403585c6fc5e13d5 SHA-256: 693bd7a18c9ac03e8a307b4239cae7ee36cc4e6667f689a13186e0dfc8652757
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are to benign-looking documents, but one prominent URL points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to the malicious URL.

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://traffset.ru/strik?utm_term=how+do+you+say+hi+dad+in+japanese PDF link annotation
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5fa367f1ef56b.pdfIn PDF document text
    • https://vizojifura.weebly.com/uploads/1/3/1/0/131070272/foxajikamunaju_sikebupoxeru_bugenijeligezi.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/dosalapasenow/autocad_3d_architecture_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeebcf3de5e49b5291f3a/1606282941182/1832517072.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/27215615731.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c42b085bf90c0e0336d5/t/5fca90e8c81a0b0777cd2a46/1607110888634/9945909394.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/35713428222.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/82979378568.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/desperate_billionaire_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/new_telugu_love_feeling_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/92142696398.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/the_egg_story_reincarnation.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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 6104 bytes
SHA-256: a46a940f1d5c79c3394c07e1c23a2d8240247c1b58b23ec58ef1382a29d78995
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 5152 bytes
SHA-256: c58c7f2c5ee870065f9dba681144329dbaf5788697dc5ba31bba8e7451eccea6
font_02_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 10104 bytes
SHA-256: 89d1b800045f522cd628d6193101f9bc2fddb83bc76f0046733919b577f8a911

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