Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20188b07f1a300f…

MALICIOUS

PDF

64.8 KB Created: 2020-11-17 01:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 22c6f2f42625818d9bdef37cf921479b SHA-1: 90761a671a535b5ec93314e72c3310d8febe0d2d SHA-256: a20188b07f1a300f861c8c26964a267527cc14254acb6b669e5b0ec617888990
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://trafftec.ru/strik?utm_term=surya+kriya+guide PDF link annotation
    • https://paraminukus.weebly.com/uploads/1/3/4/7/134705680/7f6a805337b53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f93d2182cac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f9c1b0739ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5fab7dfa93a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fa695cecbd39.pdfIn PDF document text
    • https://bepupigo.weebly.com/uploads/1/3/4/3/134317889/ruvirun.pdfIn PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/6f1abb87634c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f897e699b775.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/bafatepetuwejipunuze.pdfIn PDF document text
    • https://gozivuwedigati.weebly.com/uploads/1/3/4/6/134612943/8041634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f978e9562e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5f9c7230bfac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f89f12a5ff4d.pdfIn PDF document text
    • https://datevapo.weebly.com/uploads/1/3/4/3/134338939/6417799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0ED 5052 bytes
SHA-256: e88390d1752148fb43421e2d11be1d322a15203ca9ad5a7ffa238ad29e95c039
font_01_sfnt_off0000d236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 10728 bytes
SHA-256: 8600dda4737ab2331cf005618a3e85df584acf448e708a2769c2ce4b8f6193b8

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