Malicious PDF — malware analysis report

Static analysis result for SHA-256 d172fed701b7d6cd…

MALICIOUS

PDF

92.7 KB Created: 2020-12-18 23:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7070530761794e6cf7cee668ac696ee6 SHA-1: ff5154b70f882b873ab1b39b2822240927fe0895 SHA-256: d172fed701b7d6cdda432a0feaaeee3805208c679336d2bc315a4a13c3dd98fd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or ad fraud. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=android+tv+box+better+than+nvidia+shield PDF link annotation
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/1751773.pdfIn PDF document text
    • https://bumujonawomete.weebly.com/uploads/1/3/4/4/134435367/zagegibetolu_vagunumilaful.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/611661b.pdfIn PDF document text
    • https://dukutisanag.weebly.com/uploads/1/3/4/3/134318107/pazisademixaloj_jiniw_lexifibovijazu_jevitorovulogol.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/755372.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/gaduv_xuxex_moruti_vinukus.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/mokukes.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/5fc3051916f6d44b07cc8110/t/5fc74b5e8f0796361577ddf1/1606896480025/empire_total_war_politics_guide_maratha_confederacy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32ae812facd59cebbb095/t/5fce623a83d2ac65cc47ab1c/1607361086086/music_twist_and_shout.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf623e3c02f22b9d052320/1606378047874/ks_dragon_overhaul_2_thunderchild_patch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15fabe2fce462bc8f3d9c/t/5fc4c6fc08845d0924206f69/1606731518636/banamariragusuvurer.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_off00012e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6E 5168 bytes
SHA-256: 11108ee44f073890f143a2d7df75469dcd8cf72c1dd21ea459d50fbdaf1c8a8b
font_01_sfnt_off00013fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFF 11136 bytes
SHA-256: a5b55a28a9f8613d8923aa635e3320ab642e48e520f21d1f8990edb681a0f898

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