Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f8b17c842ce929…

MALICIOUS

PDF

64.1 KB Created: 2020-11-16 16:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6f2f26d232f61355f2583fe965ce98ce SHA-1: d74336c22d1e4eac11095a851395447b419c5f91 SHA-256: 54f8b17c842ce92989e82da694ecfb885bd7114d4e159dbe339c46c524432409
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'traffnew.ru', suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

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://traffnew.ru/aws?utm_term=aluminum+sheets+for+sale+philippines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fa45bbad0d7f.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/aa71b0d0.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/pabetezujevusobif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87083033e9a.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/gokewimevogemab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5faeb23635d29.pdfIn PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/6af66b581b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f87371e5a3af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40c79fe-cb58-41db-9111-392b04c4996c/35356173733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85aaf4c1-88d2-4a2b-852c-8dc1f6b9a722/edhesive_assignment_4_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf8b0f7-ade0-42a4-8a35-a2e245ebab55/54775091911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce63d8a0-21d1-4290-8a93-305c31749d82/legend_of_zelda_level_6_dungeon_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc943cb-f9b8-4fe2-85fc-13b08070788a/zefasepagivin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad82b26-60d3-4ffc-b541-e5ca028c7bb1/accounting_solution_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA1 5132 bytes
SHA-256: 4fec6d3bad9378b18e2968a21dc740097f91fe1525bdc311cc7677e52832db2e
font_01_sfnt_off0000d0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EC 10304 bytes
SHA-256: 8dee79a81ac79cb714cee2f13844358bfa511f0a911d6c3f364c97a3a25d6619

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