Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2966fe1ea8f4d0f…

MALICIOUS

PDF

68.4 KB Created: 2020-11-14 08:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c02cb738f4cf8803924092b776c9827b SHA-1: 90a5b91b5ac03fdacfe6bf53c79ef7627eed79aa SHA-256: c2966fe1ea8f4d0f6052ede0a46e3e9d9168ac166ab36b98157d5134fd93717f
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 0.9998

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 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://traffset.ru/strik?utm_term=sia+cheap+thrills+torrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f9f187620f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5f995959cb6f6.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/nolutodemax-tazoxera.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/pefosusawevovizeziv.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/fewunadupop/87158219997.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/st_simon_and_jude_brooklyn_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83ebd26-9a41-462a-8fd4-3ce0148a1775/13496528431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e6720c-a332-4389-b571-f751491a593a/12501185984.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/salisebij.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/79819829938.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/hero_academia_dub_kissanime.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/71780957792.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/tamil_high_quality_bass_songs.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC304 3640 bytes
SHA-256: 064c6c3630b9ebbddf2e7089efb16cf009dcdbe7f4238fd2a591ba58d59aa6bb
font_01_sfnt_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 5124 bytes
SHA-256: 583fcf473da2eef75f603bd6854509aacc5beada70fd7575f4e106636d0b6883
font_02_sfnt_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 10260 bytes
SHA-256: 1c78f4004474c8348f5487f651313c01efee1739f1174adb4e9e69d7dc68b02b

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