Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e70f219554518a…

MALICIOUS

PDF

62.1 KB Created: 2020-11-25 02:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 83748a2c30580dfbdbf3936490ebf2b0 SHA-1: e74403a07442b37175eafb3b1cb8aed399448fcd SHA-256: 66e70f219554518acc84a5435b7557687a1ebf7b2a04e0b83d776cc991713e39
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://trafffe.ru/strik?utm_term=signature+line+in+word+2016 PDF link annotation
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/sadolitav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5f9e02dc6b15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486034/normal_5fb990924c606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f9503d99b5a0.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/kavozijozelona-rozos-romuvalebiw-wemigazejuvu.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/jemoxukup.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/gunuraxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_5fa3044362554.pdfIn PDF document text
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/331fe9148fc.pdfIn PDF document text
    • https://piwazolobaki.weebly.com/uploads/1/3/4/7/134714131/11015df9ea1329.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/d96ee35d-36ac-4dbc-a7a8-c7cc55ad9280/jonajaxuwaxosoma.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/53045938411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debea751-9cb7-4056-baaf-e7ee051a5c68/15752991809.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_off0000b775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB775 5492 bytes
SHA-256: dce5955c1b97ddc6bc93438eeac2ccba038bb13ca11102f89d793459bc1493b2
font_01_sfnt_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 9912 bytes
SHA-256: 3bfdc0374482223e6e23e3a8e9c1f93b13589af2479ed75dd0095ddddab1e774

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