Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ab5ad9c1b5b7d6…

MALICIOUS

PDF

77.5 KB Created: 2020-12-25 19:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c02379c905ea293b885afc9e85221667 SHA-1: 7f681eed5c88d461e431d0884bf6491ff3f3690b SHA-256: 11ab5ad9c1b5b7d651d09c5136cd0180b597626f3f1fa83b8e9d424157f851f1
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to a link farm, likely designed to redirect users to malicious sites or phishing pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one URL leads to known malicious redirector infrastructure.

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
  • 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.
  • 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=angry+birds+pop+fruit+bomb+levels In PDF document text
    • https://cdn.sqhk.co/numanazolov/iXjajaw/82734004981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408476/normal_5fe31cff84066.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/jbibuPY/zonajowazoparimapa.pdfIn PDF document text
    • https://cdn.sqhk.co/sebudesusoj/jajgTji/free_followers_for_instagram_app_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0adb421c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fbdc3cd2c6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5fa2e7dceeb33.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/aihicc7/ragovimanozozumuxon.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/jihh8id/rio_rex_game_online_free_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_5fb964a59bc9a.pdfIn PDF document text
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/jakop.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://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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 5324 bytes
SHA-256: 0ccbeb034723d5269299648fa91fc68cc5fd090b55ad79fee27077bb8d6face2
font_01_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 10636 bytes
SHA-256: 2ac8a96e47dbd391f8b74ac71d05dd3fd0a3985bf7d2f662aae64055ea8e964b
font_02_sfnt_off00011b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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