Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33d8c9440a094aa…

MALICIOUS

PDF

72.9 KB Created: 2020-11-24 04:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534f264bdee86760464de8a7540a0f15 SHA-1: 67435b03d9853130397605be1acb59effdbac97b SHA-256: c33d8c9440a094aa785442867a8c73f02d67903771446626db4be6a7fde189d9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafffe.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=star+wars+visual+dictionary+episode
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/8805769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6707f8e-5d3e-461b-a2e5-0ac80d747677/miwopafovaneve.pdf
    • https://s3.amazonaws.com/busutafitufe/2_player_stickman_fighting_games_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/90e3f10c-d766-470a-9c88-79fbf648eb7f/notutakupapudume.pdf
    • https://uploads.strikinglycdn.com/files/5f91bad7-b216-4e19-8371-9e4ebbf64b74/9478111380.pdf
    • https://s3.amazonaws.com/liluvad/akreditasi_prodi_teknik_informatika_unpad.pdf
    • https://uploads.strikinglycdn.com/files/3afb9d80-bee6-4ece-b878-c56911391e10/gugepomalusomidebela.pdf
    • https://uploads.strikinglycdn.com/files/8af179b3-df5c-408d-9a15-3b46fc7f6873/97973136745.pdf
    • https://s3.amazonaws.com/dazutun/ninja_ultimate_blender_parts.pdf
    • https://s3.amazonaws.com/satedafadusizo/non-_arm_s_length_relationship_letter_template.pdf
    • https://uploads.strikinglycdn.com/files/6a109b7e-9071-4223-ab50-41d7f1aa32c3/adobe_after_effects_cs4_download_fre.pdf
    • https://uploads.strikinglycdn.com/files/be54aa24-7aa2-4f7a-a612-ed00db3941ca/98266397405.pdf
    • https://s3.amazonaws.com/xanebavifamopez/acid_amine_coupling_reagents.pdf
    • https://s3.amazonaws.com/vutame/laravel_send_email_verification_manually.pdf
    • https://uploads.strikinglycdn.com/files/522db4f5-9217-4e07-b899-560eeceb8a2f/gw2_trek_dulfy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e109.bin
9d813062039c96e6104e18274f37bf52f57bf46f9a3e8c65d2bb57d9a435ca89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 5424 bytes
font_01_sfnt_off0000f3a1.bin
94672486c87a4856adbf11a92367fb3cc1a4caca6cded703b16097a95069ab41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 10380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.