Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9be85b1172bcec9…

MALICIOUS

PDF

64.9 KB Created: 2020-12-24 04:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 16e3d26f2bf8c28a0f0c4930f33444a6 SHA-1: 2e07c5fa3b71cbce9418999108b52f6e97698e44 SHA-256: b9be85b1172bcec96f790f3139ac7f6162a4280e74f7ee90930f8f5bba0d52d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL 'https://traffnew.ru/strik?utm_term=hockey+canada+app+login' suggests a phishing attempt related to a hockey Canada app login. The document body, though heavily obfuscated, contains text related to 'Hockey canada app login', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=hockey+canada+app+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419002/normal_5f9bfeab70b33.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/ijfWjbs/58830991792.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/5866532.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/36e26e.pdfIn PDF document text
    • https://bozofuki.weebly.com/uploads/1/3/4/3/134322044/424752eedba7c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_5fa6a1db724c1.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/mcCifjj/zozekawefigozivoliku.pdfIn PDF document text
    • https://duketexu.weebly.com/uploads/1/3/4/7/134725944/9325076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f94be738ba98.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/yidChfh/jekupuladezemepomutesiv.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/muxozuvalubi/dafodudafezixajugiwos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392fe555-0055-473b-976d-55a211949e03/310760623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d61e775-dbdd-45bd-9418-1a0af131d832/fios_cnn_channel.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_off0000c0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C0 5096 bytes
SHA-256: 97c1bb32d4fa3be295d1906367b0559d404121f30c46aebdf1b942b205a050da
font_01_sfnt_off0000d23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23B 10892 bytes
SHA-256: 3bf3fb8e086ea585264379bd2f6ca1488cfd008459a557aec50afc2e0b88817a

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