Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f17d8c5d76d1f2e…

MALICIOUS

PDF

97.0 KB Created: 2020-11-12 23:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5ba67e170d7e3d63b2c7c5f244c6fff SHA-1: 273698403b6298d93b0bd02d6c396488f707a36f SHA-256: 5f17d8c5d76d1f2e3b17ab4939032974790dbac7ab7e8b07e39ff9dc918b5b32
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://traffine.ru/123?utm_term=miguel+cesar+perez+ruiz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fad4fbcefbae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f95d98fb8c8b.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/7579223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_5fa45c1e95b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f8b296d568fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5f932d8111b88.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/64a57b21-dfab-49a4-a586-cd15e2d6073e/xojogaduvunebozoxopusutal.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/budget_truck_rental_prices_and_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d7ac3a-de11-4b44-ba39-8347dd7377f0/wizajijanulogela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b904c7e2-60de-42f1-9040-b92c2a8aa81c/14671289472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264232db-c31a-4d8b-9722-0f4e5ff075f2/gegubixog.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/4th_year_anniversary_gift_dbd.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 3

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_off00013035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 4744 bytes
SHA-256: 59fbe0e86aea51fb78b880397304b0427036f1b50943330b4ae38dee04c54ebc
font_01_sfnt_off00014074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14074 12692 bytes
SHA-256: c51ffff6c961052bcd5da2362ab48954be9deb42a532e8e359b9d2f285f62715
font_02_sfnt_off0001677f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1677F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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