Malicious PDF — malware analysis report

Static analysis result for SHA-256 23162bf0c96ac361…

MALICIOUS

PDF

68.5 KB Created: 2020-11-16 15:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79df193ff2e5ea45429c0b9a46afaa7 SHA-1: 4cc3fa9b1995b67752618ffa02c5a66da8d8def1 SHA-256: 23162bf0c96ac3614d8ea25672aa8ed8782d3cabb1f49d1080d9c98a13f9a0cc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffine.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious external resource, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=coefficient+of+restitution+golf
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fb2656c3e78d.pdf
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fa902518f34f.pdf
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5f8e686e9ce62.pdf
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fa36cd583c5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vitelitubovuluj/business_intelligence_and_analytics.pdf
    • https://uploads.strikinglycdn.com/files/d3479cf2-0175-4582-b5d9-f4ca8c3c84f1/33786141729.pdf
    • https://uploads.strikinglycdn.com/files/35bfd3a5-b60d-4919-a179-d1b26788a9fc/abella_danger_twerking.pdf
    • https://s3.amazonaws.com/tulosa/attestation_de_prise_en_charge_pour_visa_allemagne.pdf
    • https://s3.amazonaws.com/megelugik/73160119886.pdf
    • https://uploads.strikinglycdn.com/files/37c32ba9-863c-4f98-804c-77d0039e560a/a_practical_guide_to_linux_sobell.pdf
    • https://s3.amazonaws.com/zuxadol/centella_asiatica_cultivation.pdf
    • https://uploads.strikinglycdn.com/files/826e3e53-4c38-4b51-a1ba-a8cdeb3d6c2b/h_and_r_block_coupon_codes_2020.pdf
    • https://uploads.strikinglycdn.com/files/02aef057-9e32-4bc8-a840-1eeaa1b04d6e/94254715994.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d09b.bin
03887172ecd394a2b5131dd582a9dd94cb4f4599316381f4842879a3569b992b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD09B 4744 bytes
font_01_sfnt_off0000e0d5.bin
f46a46a031dc895ff207027c611fda0e608a9afc8227abb925b4412db1879c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 10572 bytes

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