Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a7cb60805057b5…

MALICIOUS

PDF

70.6 KB Created: 2020-11-16 21:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 06c66c469d1f6c1f94814db69150e2e9 SHA-1: 1fd7a895f69d33fdce220cbce5e95fc3afdb3195 SHA-256: 78a7cb60805057b549e3d8aa6ed3babf7357afb977fac3ac7222d5d63b894726
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://trafftec.ru/123?utm_term=the+spotted+hawk+swoops+by+and+accuses+me+apex PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fa1b011f2309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fad9e78d9a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5fa49f26ccdef.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/buzewe_jaxusebivus_tepawigodo_pogetewowobol.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/befevifa/75149712280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91746a21-5922-438c-a495-5274e7151352/61159686450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791ddb9e-f670-4da8-b61c-4bf86962a505/nekawotuvovofunajoli.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/23196276716.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/41440502402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa121d3-772f-4c7c-a5b0-d74bb5fb46f2/32542277668.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/87042764040.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/second_amendment_morgantown.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/wiwajofeguvike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05356111-24b2-420f-ad5d-271d6244850d/as_estruturas_elementares_do_parentesco_resumo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 5600 bytes
SHA-256: 14e8e99743eba7b1cfb6ea7eefda54360047d2219273279c7c40af6d9ec63dc3
font_01_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 9904 bytes
SHA-256: 00c8f79f69a09347c5c05ea57e82f94a260e9d6475eea24ef65e9e0e9ca76d9a

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