Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3b3316c704dde7…

MALICIOUS

PDF

74.3 KB Created: 2020-11-10 17:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e9067116fe9b272de0a10b0e2a66f108 SHA-1: 21354fe4953c9d79faf9835e7e1159e8de7bfca2 SHA-256: 2a3b3316c704dde7e816d45ede28235d9bf7eeeae91d39bda059aea9fa8cdc1c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the primary external URLs is trafftec.ru, suggesting a potential phishing or content-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL farm point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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?keyword=hugo+weasley+fancast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5f9d5f4439f85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f98686b76385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f8c51e695d05.pdfIn PDF document text
    • https://litovabijoku.weebly.com/uploads/1/3/4/6/134666457/meponolekegisekukabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5f9bd86c18773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5fa72ad3757fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fa83eebe56dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f939592195c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f95c70a19f71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/unlockmytv_apk_firestick.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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5108 bytes
SHA-256: 65999c0665def81797bf33e63f1d89592f41d445bf4aa6d2182dbcf0484db777
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 10480 bytes
SHA-256: 229082724d3b2b8ffc81b6d0801005d58a4a705393d3ea2e62fb6ffece41638f