Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39eed84cc24c711…

MALICIOUS

PDF

69.8 KB Created: 2020-12-22 23:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 70b784e31f0ef44f5b330480334c0a41 SHA-1: ccbf378fe76502361d2c35aba0df163eb66aefd1 SHA-256: f39eed84cc24c7114b0e3279172e4948ae9fdc19afb41a9fb3ed91a2c2887113
244 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting services, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'carrom board game download', suggesting a lure. The presence of multiple PDF link farms and a critical redirector link strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=carrom+board+game+download+free+for+pc In PDF document text
    • https://lutavazakagege.weebly.com/uploads/1/3/1/3/131398084/kepoluzug-vofizaze-ditulapenej-pijofamib.pdfIn PDF document text
    • https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/sonipemowotumoba.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/fuzoleboteviw.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/3763477.pdfIn PDF document text
    • https://kadukutinebi.weebly.com/uploads/1/3/4/7/134747046/xodubagisop.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/686ab.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/tujijoletulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf43eedabee7b440692ae/1606218814766/ladurasolud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8fc0b6b03258f35503a/t/5fc3e3316457125654b36246/1606673202930/jevame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6a79d4-607b-421d-8999-d480d1068c12/9474401763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a288c9f-f5fc-4201-a1f3-f6072fe6926e/music_theory_test.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/xml_formatter_sublime_text_3.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_off0000d43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 5436 bytes
SHA-256: d9fd0766504f0f56866fd47fa38e45a8b98c671d8a356d17e48c8b345a72ad95
font_01_sfnt_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 10540 bytes
SHA-256: 20147889f7feaaf0ab62287950a1394487ed673c495a99548b1c7207f55e30c3

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