Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ff60452ae33209…

MALICIOUS

PDF

75.4 KB Created: 2021-01-06 07:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c3b908a52ef686756d58db24c99d6aad SHA-1: e874fef2a9d11fab15e0a1c147478a06b44626b9 SHA-256: 30ff60452ae332097c0dedd7334e69cb02c5bfacdff2cde7fb7657606dc34669
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection strategy. The primary URL identified is traffset.ru, which is likely used to funnel traffic to malicious destinations.

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://traffset.ru/aws?utm_term=apache+poi+java+excel+date+format PDF link annotation
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/vuviwu.pdfIn PDF document text
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/9662879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_5fba04abc98b5.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/butedakesobevuw_fosetuvu_wezezewelerabe_kigedakonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5fd79bc4040bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5fb6a656b09fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_5fb47aaf414ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f96926e98685.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/b54a8dac-3bfe-4a44-95ab-e0eaa6cd428f/7444107629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d350020-9692-4cd2-ab8a-090e47355721/irony_in_heart_of_darkness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cffa683-8919-408a-b015-28e6cf056b91/wenifalebizurelapumedirul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bac475-507d-4f85-a423-5bff9a980f3d/walter_benjamin_theses_on_the_philosophy_of_history_analysis.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_off0000d335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 3196 bytes
SHA-256: 13a74b093460f80eea1b9f7e4e81329a1181f544ba25c0c27177a9ed19838e5b
font_01_sfnt_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 5412 bytes
SHA-256: d6ff7fc8c79f2ccb7546773b59b0346f60d59cad58e4c759e0fa7eae5568f543
font_02_sfnt_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 11660 bytes
SHA-256: b897c674f1172c624e58860d29f9dede47ca01c87dc751fd5eeda04b6369857f
font_03_sfnt_off00011901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11901 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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