Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a662d017dec39a…

MALICIOUS

PDF

57.3 KB Created: 2020-12-04 04:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 917212d6f020e047f834e356565cf387 SHA-1: dc735f583ef7a69fed25944280016535191cdace SHA-256: 73a662d017dec39a27f3b46981a542c55bf1980d262cc809b7bba8221b121738
176 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing campaigns. It contains numerous external links, with one pointing to 'traffnew.ru', suggesting a redirection to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 57 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://traffnew.ru/strik?utm_term=umd+women%2527s+soccer+schedule PDF link annotation
    • https://danovijo.weebly.com/uploads/1/3/4/7/134774389/zuxaravono.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/fizude.pdfIn PDF document text
    • https://piwoviwilo.weebly.com/uploads/1/3/4/3/134386066/tefig_vemagob_wosanefufot_wakerejite.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/211d3e4d-a9ec-40af-8a07-85673da09ed3/software_attendance_management_solution_p206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d1a354-cd7c-4587-94aa-0a0bf2ec7a11/wafivowuvafofekikupazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26da8902-7cf3-47ca-946e-5a7f25084d8e/numal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bb2c88c99b6d37a6398e/t/5fc961afcc00d445e1fef062/1607033264236/digital_marketing_assistant_salary_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bf52a4-2f0f-49d5-8493-e249a47acbc1/fotitivo.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/5144042267.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf077ef3361272aead41d/1606217848312/58471860633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ddf0f8-8617-4328-af95-1a4bd30b1fcf/vojawedixofedutato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3f4cfc-8a61-485e-ac2f-e0969280257b/31012251252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee5482e-594e-4044-92e2-51caef8dc108/j24_racing_crew_positions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe2015f-3139-4dde-88d8-8ce2c6628556/branchement_interphone_2_fils.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358e76ec-2542-45f6-90bd-4a4e8d1bce93/vefifopomepowesozegukasis.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_off0000ae31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE31 5084 bytes
SHA-256: 69ba79d7898fd1b01114721553ff813ab9a5f2093b4092372aa225ff49c2be00
font_01_sfnt_off0000bf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6C 7240 bytes
SHA-256: f3fd4072d62537b1fa3bec45e2b059ba99716b31bf7a04a3676bd774faab8a3a

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