Malicious PDF — malware analysis report

Static analysis result for SHA-256 0225a87d309bdbfc…

MALICIOUS

PDF

99.7 KB Created: 2021-01-07 21:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0ec5d475f3670cb1619481c453c52a86 SHA-1: bae48a50decd704df11b75914d21af08360b98c7 SHA-256: 0225a87d309bdbfcd794fcc6e2f5bfdf7447cbbf67a7de36204ce5cb2a33de28
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to 'trafftec.ru', suggesting a potential phishing lure or a link farm. The document body, though heavily obfuscated, contains text related to 'felting wool' and authoring information from wkhtmltopdf, indicating it's likely a crafted document for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=what+is+felting+wool PDF link annotation
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/xovipiguta_rizege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500877/normal_5fae98de7b4bc.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
    • https://uploads.strikinglycdn.com/files/7feecbee-437a-423c-bcbd-c5c92d5d813b/98111857751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a1fde9-f28b-4d60-9043-63740001bb0b/kewuzeromazajajegoriki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86bdecf-5e10-4d0b-8bbb-cf33375495fc/betaweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89c04ad-60c5-4dbd-9c14-71858bd8e594/kabiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d5097c-75bf-406c-9b0a-0596edb9af44/introduccion_a_la_probabilidad_y_estadistica_mendenhall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4cfa30-4a43-42be-9093-2f1bb8d4fa15/9942368980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4de9001-b1d2-4fa9-b7c0-f6a6a988d119/nedenisagavagalabol.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/wiwodimosarafegavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a833c4-dcea-4f40-9d93-c9868241f00c/nojosimegonorumowuzipeta.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/restoro_license_key.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/52123377431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7022ea9-cbad-4240-9dd0-6205d17ca48b/irish_coffee_glass_mugs.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A0 3300 bytes
SHA-256: 377a85d869058ec0d72b0752b3da6ce3d2964a3e7591ae2f0c51d3f65ddf037d
font_01_sfnt_off00013e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8B 4824 bytes
SHA-256: ded64aa957519e399becf674f8955ab54d99ed1165a1e31a08da638423203814
font_02_sfnt_off00014f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F03 10748 bytes
SHA-256: 8aa77ced68ad5c590ed6909e09da355069e83ecec9e8539370b16cabbf34b8ab
font_03_sfnt_off00017368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17368 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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