Malicious PDF — malware analysis report

Static analysis result for SHA-256 9689513adc030de6…

MALICIOUS

PDF

77.5 KB Created: 2021-05-20 11:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c906cd3371d381212158c1822453d015 SHA-1: 5acae89012fe0f979fd0a3353ea3e38f28031fb8 SHA-256: 9689513adc030de64dff35366fc6eb52b2dd019c11687354686646cc881eaf8c
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 0.9997

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://resalured.ru/strik?utm_term=download+game+pixel+car+racer+mod+apk+android+1 PDF link annotation
    • https://wafebunutixiwi.weebly.com/uploads/1/3/4/1/134109037/pojamajadodor-ruledudosukope-pesina-sokijemita.pdfIn PDF document text
    • https://vilaluwavo.weebly.com/uploads/1/3/4/3/134338374/demijuwu_zupijadez_rimesigoko.pdfIn PDF document text
    • https://wojozumokibenap.weebly.com/uploads/1/3/4/0/134097994/kasutile.pdfIn PDF document text
    • https://xuwutofir.weebly.com/uploads/1/3/0/8/130813860/sasomaxenu.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/1238407.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/c19986e87.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/veres-pitisazigap-kuwurogiza-kebakopudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_60696e4534a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_6044def35090d.pdfIn PDF document text
    • https://latesadujogoxov.weebly.com/uploads/1/3/1/6/131607544/gogeru.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/c4620.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/virugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_606341d2d4542.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/52b82c.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/rogoxubez_fujupufe_kikefojora_fosureve.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/2682600.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/86a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471985/normal_605f669faba93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_606409e554133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_60048d8fa58e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 5492 bytes
SHA-256: 748d33e959db88d7b6b0be4541348cfbdfeb6aa9a719c3fb7a43f1a5356676d8
font_01_sfnt_off000102e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 11016 bytes
SHA-256: 84cd9f166d460d23afebd463796ed2e2711def9d055abc54a19fa4e8fd515eb2

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