Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a92acbce67df35b…

MALICIOUS

PDF

64.8 KB Created: 2020-11-16 23:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52c69ceceb2e2b816ea38f0620bf6edc SHA-1: b937ff34fa59a847852a72ea0e69387e29abce7e SHA-256: 4a92acbce67df35bc1a3d9465a56253090a6615b8c755630b2f92bc493aab274
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://trafficel.ru/strik?utm_term=piense+y+hagase+rico+pelicula+completa PDF link annotation
    • https://towajusuw.weebly.com/uploads/1/3/4/5/134521237/zeruzelov.pdfIn PDF document text
    • https://sositero.weebly.com/uploads/1/3/4/3/134389363/dee2d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8b9fe59a487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5f959ab21a287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f966f2c343bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9191ab9bfad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f93886579224.pdfIn PDF document text
    • https://fapezadedafax.weebly.com/uploads/1/3/4/6/134609176/3052013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fa179a991d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fa235e276346.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zegolanizu-bilefatesab-koxolez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5fa9e3a855fde.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/1ac49f01e0695.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_off0000b1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B3 5332 bytes
SHA-256: 3c16cdedd40675a8e9969acfebe530ed19b8f8549444beaabf669cba823ba339
font_01_sfnt_off0000c3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A3 11100 bytes
SHA-256: a726881171e204daeb6a435934d044207008de17b99f3ccb983cd28a419b1bbc
font_02_sfnt_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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