Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4e7998851aeb5e…

MALICIOUS

PDF

67.1 KB Created: 2020-11-23 19:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 235ceee84b8a2d16c195328387c38654 SHA-1: 6738327825212c51cabbe9646b7435f760226a5b SHA-256: 3a4e7998851aeb5ed7f37eddc73e273a15e46ab64d2364857e8d053894412c02
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, with the primary suspicious URL being https://trafftec.ru/strik?utm_term=forge+world+reaper+download. The presence of numerous external links suggests a link farm or redirection mechanism, common in phishing or malware distribution campaigns.

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://trafftec.ru/strik?utm_term=forge+world+reaper+download PDF link annotation
    • https://wokukome.weebly.com/uploads/1/3/1/6/131636951/kegogebanoba-kozunubifojeva.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/9781852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5fa0c73745a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_5fb7eb709223c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5faeef07ef876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f9a4c16362cb.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/c824248e.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/zuwimadaneb/epplus_read_excel_worksheet_by_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de694a9-7e84-49cd-87d9-2ffc51788fd4/92417349141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07047f99-bbc2-453f-9ec2-84de009aaae6/naguvixemitewoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460d84ea-42f2-479f-a963-a01c1ebcd468/40032936922.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC800 4996 bytes
SHA-256: f3e01ad8dda739a28d98a384b52055923d0a363781c4f10bea3603975010d1d4
font_01_sfnt_off0000d922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 11344 bytes
SHA-256: 8dcab056e0398da5cf423deb7960b92808b89683c52c2e97161c93f5911c6adb

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