Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1e007b1fabde5b…

MALICIOUS

PDF

78.4 KB Created: 2020-11-13 15:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100ec88156ce38c471e36c3d483a5161 SHA-1: 1931cf2fa5d1a117f1219eb450fcb0f50b7edebe SHA-256: 6e1e007b1fabde5b14d247b203f39084769e5e5734a33e5c02cea05717f58715
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as reports, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=global+gender+gap+report+2007+pdf
    • https://pagimoroxu.weebly.com/uploads/1/3/4/2/134265496/1717293.pdf
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5fa310acb46f9.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_5fa60970314e3.pdf
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/cfa6e37f0d0.pdf
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/9171637.pdf
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/nadubakere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5b2f7515-8db2-414f-8fa8-1db6936a9326/9070371393.pdf
    • https://s3.amazonaws.com/kakef/ants_found_in_new_mexico.pdf
    • https://uploads.strikinglycdn.com/files/cc9f4a79-defe-40f6-ae20-1cb68fa7b80c/29888028698.pdf
    • https://uploads.strikinglycdn.com/files/7f9cdf98-20a3-4885-8f3c-2f83f1e56320/exemple_de_discours_de_commmoration.pdf
    • https://uploads.strikinglycdn.com/files/482c4152-ace8-407b-a29c-a4384a77a784/diary_of_an_oxygen_thief_free.pdf
    • https://uploads.strikinglycdn.com/files/9d42fa84-f998-4ec2-9354-1e53789ee0a3/44991005860.pdf
    • https://uploads.strikinglycdn.com/files/be8f4544-0586-4889-9b2e-98890b15592e/80871950506.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_off0000f479.bin
9dfa48967f74444bb3fe18869b51bfe748429bcb665834ef80652a40781de1b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 5556 bytes
font_01_sfnt_off00010775.bin
7f67bc093b81f219e1dffae2759c0e1103802d2e3d90ef058e0fad12feb44928
pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 11060 bytes