Malicious PDF — malware analysis report

Static analysis result for SHA-256 5364145f95d4ae73…

MALICIOUS

PDF

67.1 KB Created: 2020-11-20 10:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783bacb1cbe0e4bcaa839674bbef7d7c SHA-1: 2886a30ca6340bbb21ef43fe0642a60c270a32b9 SHA-256: 5364145f95d4ae7312a49e68f44f0c53c89b616bf97b8cc1b41c3ca846592602
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary links points to 'traffset.ru', suggesting a potential phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=to+kill+a+mockingbird+brief+summary
    • https://lojapajarete.weebly.com/uploads/1/3/4/5/134521209/jazazatekizap.pdf
    • https://cdn-cms.f-static.net/uploads/4459060/normal_5faa60101f75c.pdf
    • https://xubisimas.weebly.com/uploads/1/3/4/7/134769706/xobalegaxira-ruxekalevoxug-tajefax.pdf
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/9074411.pdf
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/5558596.pdf
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/pisewane-ludakin-vuwitafi.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdf
    • https://komavumi.weebly.com/uploads/1/3/0/7/130738531/9529202.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/henghuili-files2/xumozepipazezuxa.pdf
    • https://uploads.strikinglycdn.com/files/552306bf-ab03-432e-9b2d-219fab74c8ed/the_real_world_san_diego_episode_12.pdf
    • https://uploads.strikinglycdn.com/files/deb7e786-702e-4f65-a303-5f192c64ca14/25912388903.pdf
    • https://s3.amazonaws.com/kagedatabujo/clash_of_lights_hack_apk.pdf
    • https://uploads.strikinglycdn.com/files/6ccc5bd9-43a4-4382-93ce-b271f14d3542/super_mario_odyssey_speedrun_route.pdf
    • https://s3.amazonaws.com/fedufiporara/after_action_review_template_army.pdf
    • https://uploads.strikinglycdn.com/files/c1a7dc72-f6c8-424f-bc5d-d60f3f164b21/trastornos_alimenticios_oms.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_off0000ca51.bin
21166f3a2bdc8d7065060ede53119d28e50be85519ebef79e57edb2899baf398
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 5596 bytes
font_01_sfnt_off0000dd48.bin
7ef7e7d125ef4a563d9a62f864878414ffd8dfe7be3ee504f640c0bea7f9063e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 10016 bytes