Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bb4d5387ba8630…

MALICIOUS

PDF

78.0 KB Created: 2021-04-30 13:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 692196e34b4ecc8201f6afb167332225 SHA-1: 909af6864e1fd3a63e31c80ee2813480eabaa9fa SHA-256: c6bb4d5387ba8630a1ee3738445a679ecaaf9dd79c362dc6a5103f51cb45a1be
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=2019+toyota+camry+xle+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467325/normal_6065b18ce28aa.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/jibixidoruve.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/knee_exercises_ortho.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5fc8b7af2700f.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/after_series_before.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/14109870749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_6042f7074ef95.pdfIn PDF document text
    • https://mawovajexajadow.weebly.com/uploads/1/3/0/8/130874262/gemomozu.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/livre_orthographe.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/vokonafo.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/630bcc12-d6f9-4ebe-ac88-cf6037c3eb67/will_eisner_how_to_draw_comics.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/nerenopegidoworux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e9ba38-4b3c-47c2-bbf3-4f460b448707/20965010043.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/satal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a553c81-d812-48e8-b48c-06ed0adabc7c/how_to_fix_an_lg_fridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c2ca89-8d62-4993-a064-7a86073f5cb5/66021099935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99ee396-2504-4abc-9d89-68ff536d7b33/does_brandy_melville_accept_returns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99a7da2-0b93-4e9c-87ef-ee3f9db7c98a/57500165163.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/rotuzasose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54cf23c-32d8-42d8-91d9-23796925f71f/sudexepavekiboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d39a87-0b38-460b-948a-b72a9d40c557/bomepat.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5584 bytes
SHA-256: 8deddfa69bb50c1dff8f2abb836516a5e05adb63dd51cdd13b701dc95ba1889b
font_01_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 11404 bytes
SHA-256: 6a0694ef1121f37558081f170819516e777303c9181f9d6ac8dea9eff847ec75

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