Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914c58daea58572…

MALICIOUS

PDF

73.3 KB Created: 2020-11-22 06:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 36ce1ec7c7a5f68ac67f73db64695965 SHA-1: 970a379d37ad817696ab71da7d44cf60ea9c67ea SHA-256: 9914c58daea585720e8879956bd2d9688626b108107702052ee431e81fb15aec
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-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=45g+to+fl+oz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8df3312d103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f939d36c455d.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/1871007.pdfIn PDF document text
    • https://memupenenukef.weebly.com/uploads/1/3/4/5/134527104/zegav-tivapaje-kujekazulus-rakegidodunazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fa869c5ef0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5fa077efe156d.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/6833399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f8fb71f653df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f9585cecbb74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5faf56c2c3955.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/bifamomove/conservation_of_mechanical_energy_worksheet_roller_coaster.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/pa5109u_1brs_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/testament_of_sister_new_devil_departures_ova.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/vilamilovafizojupo.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_off0000cdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF3 4616 bytes
SHA-256: 19a7d3ea58e83d9a5caaeba844b4ce5aa461c842917655ff35c66164ba15e4a9
font_01_sfnt_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 15812 bytes
SHA-256: e89fabe2416c0420f8ebe09b226586c67a2ce8e525f7067d82b70e9540156e52

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