Malicious PDF — malware analysis report

Static analysis result for SHA-256 64340170b6268fc0…

MALICIOUS

PDF

74.1 KB Created: 2020-12-28 05:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1affda152b4405633ffb78fd50ecf1e SHA-1: 761437a304a0814ece31a8e459261d4ff28de001 SHA-256: 64340170b6268fc0ba27b2a0a94d2b4502342e574b823da1bf6165b2cc92579b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. An embedded URL, 'https://trafffi.ru/strik?utm_term=psoriasis+treatment+injection', is present and likely serves as the primary lure for the phishing attempt. No scripts were extracted, but the PDF structure and URL suggest a phishing campaign.

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://trafffi.ru/strik?utm_term=psoriasis+treatment+injection PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387702/normal_5fc46654f1595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fce9c4118989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fb5a4efcca11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5fb306f01b0b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fae639a266da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5fbe187af3650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_5fbb41b1de522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5f9ea0fa45a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5faef57c5d1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5fbf95547f092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5f99ea4c58924.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/5ae5d1e9-7655-4e49-b67d-06b2c4e33e9d/16553434498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bd24e4-1c68-4aed-9585-aef1bebed0ae/causes_of_bullying_in_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83468792-33c4-4361-aa1d-2688c319f5d6/13693440116.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/aha_hypothermia_guidelines_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7e6098-cf44-4248-995b-f29ffdd16b2b/kamuzaberorox.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_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 4992 bytes
SHA-256: f2bed50b349e0a3f9b98da59fe26c34158502130e8cf552dc9ea1be2cb257acc
font_01_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 10764 bytes
SHA-256: b34ba458957077151dc75b6036a8661f5ef93c530451953923ccfdf0f8760eb6

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