Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a041e29b92dd6dc…

MALICIOUS

PDF

66.6 KB Created: 2021-01-14 06:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 618f38f50d2fb5c7050b5dee344e713f SHA-1: c7a4abcd64e0144da3875bed9c35f3409349d63e SHA-256: 2a041e29b92dd6dc9fd825df1af945e4c98338792281c04898d8e33ce63750da
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains a large number of embedded links, many pointing to external PDF files hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a known malicious redirector URL and ClamAV detection further confirms its malicious nature. While no scripts were extracted, the structure and heuristics suggest the primary goal is to redirect users to potentially malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=abcd+2+song+pagalworld In PDF document text
    • https://cdn.sqhk.co/bajipugotox/hGqjd4I/tractor_v_phoenix_live.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fbc829aef3a0.pdfIn PDF document text
    • https://site-1168018.mozfiles.com/files/1168018/jukidebubuli.pdfIn PDF document text
    • https://site-1168171.mozfiles.com/files/1168171/49806634717.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/jbfhaic/warpath_game_ww2.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/icTPhb7/murolisabafuragemonep.pdfIn PDF document text
    • https://site-1175354.mozfiles.com/files/1175354/3680809424.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/POaeid6/86912060912.pdfIn PDF document text
    • https://site-1084156.mozfiles.com/files/1084156/saneniwivaravuxorakupi.pdfIn PDF document text
    • https://xisudujerixaxir.weebly.com/uploads/1/3/4/5/134583325/fimabopakagokul.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/4352056.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/jiwisi/leranemeji.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/18725976411.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_off0000c374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC374 5592 bytes
SHA-256: 127731132bafed36cce0582621ec6a1457648517d6d504d52df467ed7e97e749
font_01_sfnt_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 12096 bytes
SHA-256: 1806f2dae6c6d7e0305ef1601e2688eb39f174ca2aacdeed5a05c997cd336162

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