Malicious PDF — malware analysis report

Static analysis result for SHA-256 568b8027ec62b3d9…

MALICIOUS

PDF

70.0 KB Created: 2020-11-25 03:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 273bf258edf52debd52d37e592914883 SHA-1: cbd85dbe2bcec4cb5bdea7378fb024a2f54be455 SHA-256: 568b8027ec62b3d95bb284e16ddb07e93ac17fe00a44326cfbdda4a9d3a0d0c6
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 a large number of external links, identified as a 'PDF_SEO_LINK_FARM', with the primary URL being 'https://traffset.ru/strik?utm_term=gta+iv+unlock+code'. This suggests a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://traffset.ru/strik?utm_term=gta+iv+unlock+code PDF link annotation
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/71cda4164198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fab5150802f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f963337d01bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_5fba6f4cd07bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5faaeee9db628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_5faec0b92c2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fbc17b833be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5f9eecf1d1db4.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/27b871ed-e223-4fbc-a6ef-6cc2d5af6f50/66924895226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02f6bd7-5841-413c-b264-64da97a1d8df/64720430890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b485a71-ee7e-4b16-bbe8-38b4d2cde784/benejatuxukem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6daca58-6f10-425e-96a0-0473b17aba26/favuvuzolosomel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7ac645-4350-43fe-9210-27f4e6f64559/8611455125.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_off0000ccab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAB 4816 bytes
SHA-256: 32adb672d4c7622849c1a66ecced851987e230562be804ca02457f34c8ca98cf
font_01_sfnt_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 14780 bytes
SHA-256: 97300594b3ee7a728c416897815017b798da3a027b69cde9d709d1c7a183017d

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