Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3919a5986939dda…

MALICIOUS

PDF

72.0 KB Created: 2020-11-24 09:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d9fd30b1393d47e35f805647ed3e92 SHA-1: 1f40d82a03412dc3f7671675ce0b983fdffc25ce SHA-256: c3919a5986939ddaa20c14121b46b68f0aad77f593aeea8ba6a68a608633a565
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and utilizing UTM parameters, indicating a link farm designed to redirect users to malicious sites. Heuristics confirm the presence of malicious redirector links and a high ML score, strongly suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and link analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/123?utm_term=proclamation+of+the+kingdom+of+god+wikipedia
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/fetukag-tomipuve.pdf
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/fisixopat.pdf
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fbbc50795762.pdf
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f875b9400bc5.pdf
    • https://cdn-cms.f-static.net/uploads/4461780/normal_5fb2c16cc7a5c.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdf
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8ba11615e02.pdf
    • https://cdn-cms.f-static.net/uploads/4465919/normal_5faf73ef72ebc.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8602786.pdf
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/615057.pdf
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5faaeb7b59932.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fomaralunex/26774414675.pdf
    • https://s3.amazonaws.com/jipowumat/bac_international_maroc_cours_svt.pdf
    • https://uploads.strikinglycdn.com/files/48e5999b-1dcb-436e-91fc-7df33c9e3850/legally_blonde_jr_musical.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf09.bin
abcf2351aac63f22f6de1b5f7daae638bec272aa4434a61b8f638933cafda3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 5336 bytes
font_01_sfnt_off0000e10e.bin
2d929afbbecd7e57b7a2c9675e9ebbaacf0bb2cb3d812dddb5dad435fcfac8df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 10548 bytes
font_02_sfnt_off000104f1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.