Malicious PDF — malware analysis report

Static analysis result for SHA-256 496fb05aac8d2571…

MALICIOUS

PDF

65.1 KB Created: 2020-12-19 14:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 14b8a4f085f7a35e99ed4444c4cb33e8 SHA-1: 1486bce5ffeec6c42fcb4043c23af62c8159715f SHA-256: 496fb05aac8d2571dc2d78e5c5f4c22d4437980356e787269cc9dafd0f747f16
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a critical heuristic firing for a 'PDF_SEO_LINK_FARM' indicating mass external links. One of these links, 'https://traffking.ru/aws?utm_term=sims+4+cats+and+dogs++mac', is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/aws?utm_term=sims+4+cats+and+dogs++mac PDF link annotation
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/ninefikax.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/a63a159cd9a1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4401f3-e9fb-46cf-8d34-19ec014eb3b6/boraxegitugadopi.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/zovilokovafiloralodu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/85786747296.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/58882754206.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dc2688c99b6d37c954d5/t/5fd18233f2ee360040f0df98/1607565877895/make-_up_me_superstar.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/infographic_poster_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/font_awesome_5_cheat_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5bbd26ff1194f9548e9/t/5fc87045d6e0cc37e33d3aea/1606971463988/wasibomanozenawikez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc20cc6f8cdb769c62aa612/1606552775985/monster_fm_transmitter_car_charger_instructions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4078787e879896c419e/t/5fc175539ee0f32b878a27c1/1606514003568/17135128781.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF24 5320 bytes
SHA-256: bb4f262d95d545e93f6c76a8bed54054c96df886e6ba096ae51731ae8b61a2d8
font_01_sfnt_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 11324 bytes
SHA-256: 14633c217bf8c0ad71db7cf0af7c632fe0a2da156ac547661c0bdf5775d49cf5

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