Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed02c9184ef3462…

MALICIOUS

PDF

89.7 KB Created: 2020-11-24 18:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9f983543c212145c434687bdccf11b5f SHA-1: efef212b8884e762db7e6908555a100c718b8f27 SHA-256: 2ed02c9184ef34628ad44a0fa31ff9a4d3910b72ce3734570921ac3b17c0719b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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=opposition+to+motion+to+quash+service+california PDF link annotation
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/gezumuwavizegekis.pdfIn PDF document text
    • https://gilawigegazimo.weebly.com/uploads/1/3/4/5/134520665/mumij.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/6902707.pdfIn PDF document text
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/2019662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9313fb19421.pdfIn PDF document text
    • https://jokatilowiwege.weebly.com/uploads/1/3/4/3/134369617/bekabokaduto.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5686684.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/pixagejelosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_5fb614cab2dd5.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/587783.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/jixerubowi/11873019287.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/giwexasirupebesafipojubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/rukigugutagunatiwufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84bcb27f-2367-4e87-b988-c396b899a6e7/dowarilasisutumivijateje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effc1400-63f1-440f-bc7d-25bc11b88405/63115668735.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_off00012125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 5468 bytes
SHA-256: 88793fd77668f11e5a899dfbe4540ef0f86cdbb96b5d69d88fea3e773d0434a9
font_01_sfnt_off0001339e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 11352 bytes
SHA-256: 53c2b2026bf15c2625f1748e3ede5d71ccbbe4627c5db6e91996821160b5e4c5

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