Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b2f8d5cb16f7a0…

MALICIOUS

PDF

77.1 KB Created: 2020-12-25 07:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1687932be146b13bf4727e89bfb0085e SHA-1: b83087b9e223f2b578b35fc70ee7e10b9a4348ed SHA-256: 22b2f8d5cb16f7a0d185e9d5e622281c3b1dfdf65b8314f7b2853d7f90189ce8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent URL, 'https://trafftec.ru/strik?utm_term=rock+and+roll+music+chuck+berry+guitar+chords', suggests a lure related to music search terms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

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://trafftec.ru/strik?utm_term=rock+and+roll+music+chuck+berry+guitar+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413867/normal_5fa3e97d2b4fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fab64b0bfcaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_5f9e66221bd2f.pdfIn PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/panetelojopu-neduveretij.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/3c3162a2-aeab-4ebc-8f6b-d20317c4dc63/potion_prices_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7804f0ee-100d-4b88-ae31-5bc57a26a8b8/3121811440.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/company_profile_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda51d78-45ec-4430-a5f3-2236a6980036/xibadakofezaliru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7666473a-13c4-4c69-b88f-6f60d645b0be/14977757563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1f251b-dee3-4fde-98c7-5c5fe64d16a5/one_minute_manager_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/gcse_english_exam_model_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/glenwood_arts_fest_school_of_rock_chicago.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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 5668 bytes
SHA-256: 794dc7560553683d888103ce7adcb4169e1982e06e44526b1ecfd3206bc31b85
font_01_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 11608 bytes
SHA-256: e39da5c2f44b0bc3fe4f9ed89fd0e0a8d6d648c6123a0c1a6dd969c15f806787

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