Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ee740b114d2e62…

MALICIOUS

PDF

75.6 KB Created: 2020-11-10 05:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7596f029670f53e5cbd60c3d3cef2d0a SHA-1: d7b1443412314ecdbbbff37eb9b2366b1c50f684 SHA-256: c9ee740b114d2e62d79c69c021a877cfdf09affd046a5179080c4254c9f541f7
156 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 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 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.
  • 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?keyword=susan+forward+emotional+blackmail+pdf PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/fiwifavi_vowaferojofaj_favunukuvew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8745ceea267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5f90b04494725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_5fa395f81f28c.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/sujepusefenafula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f88449e4842a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5f95e656b41a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3fd069ca-6d4b-4b44-9722-b3ac68a6b284/rutegajegegilemizumojoma.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/donatukazuwakurariliz.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/spiderman_presentation_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85192a9-5bce-4d80-8b9b-43755e876f09/rubuligugizesoluxugamef.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/acm_multimedia_asia_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/41912493421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 5580 bytes
SHA-256: 8dba139f52a044de49539ea5d1df81c2d9cc59137029f617ceb5de50d0cf15af
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 10944 bytes
SHA-256: c985255d07102c30686a7effeb10ace43524ac39b0cc972bc78e092d7092c387
font_02_sfnt_off000112e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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