Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b09863d2c68ff90…

MALICIOUS

PDF

76.9 KB Created: 2020-12-16 14:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0859944eca4d1952599952d3ae18b5d SHA-1: 9b1b9bb7c5a040aff9a2b19de8dcdb4a2f46e2f2 SHA-256: 5b09863d2c68ff90394871386a58d86c94ddf58bc3f1f9b5c76dc0840c67db23
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body contains text suggesting a refund or guide, and embedded URLs point to domains commonly associated with phishing and scam operations, such as 'traffking.ru'. The presence of multiple distinct hosts and a link farm heuristic further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=ex+factor+guide+refund PDF link annotation
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/7436612.pdfIn PDF document text
    • https://sikegupul.weebly.com/uploads/1/3/4/6/134681682/komixuro.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/miwewon_navutefizotu.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/budewameda_lagoxogit_patofadog_makigi.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/povuwovek.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/mipenoreka.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/3543274.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/1967ef.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/a5c18123-d237-425e-b3f5-b4934845fb4e/bibb_county_georgia_school_calendar_2018-19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debb8837-b854-425b-88cd-360bf2156a0b/toduwerez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd23554d-df20-4b40-8d07-a7d4f49f7ea1/combat_fighter_system_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77355d16-4680-47da-ba0c-b1d98ccf5511/12724939163.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_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 5004 bytes
SHA-256: 8ef0d032eaf862000a6512579e6fcdcf1211a9a3add7e93c8e49402c03663221
font_01_sfnt_off00010156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 11176 bytes
SHA-256: b6c42192a5fae4789c5bae853d2a0309b8318f07dd17480f191c2c0b9775f6e9

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