Malicious PDF — malware analysis report

Static analysis result for SHA-256 f214a62421501c59…

MALICIOUS

PDF

67.6 KB Created: 2021-03-31 01:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3de2b020fbfd2edeffdffa8137f16ef3 SHA-1: b200170c11502ef98e907a76dd0dd180cb435983 SHA-256: f214a62421501c59f25aac6385646057487f1c5405651f5134cd4cd829b360f3
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URIs points to 'baarspo.ru', which is likely a phishing or scam domain. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/strik?utm_term=is+it+bad+to+plead+no+contest
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/tarifibowe-wusone.pdf
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/9e7815553f217fc.pdf
    • http://bionatur.space/tokuvisomapizotikafs7ye1.pdf
    • https://cdn.sqhk.co/nemoludajedu/BjjNyvW/16333515479.pdf
    • https://cdn.sqhk.co/tipefimex/x0Nhinl/57648988794.pdf
    • https://cdn.sqhk.co/nimuxugemu/jHVhd0f/merge_gmail_contacts_to_icloud_on_iphone.pdf
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/7187486.pdf
    • http://trikolor.site/guitar_arpeggios_exerciseso6vle.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/piwupevivotixi/82126029713.pdf
    • https://s3.amazonaws.com/tetofamuxulil/interview_questions_for_accounting_clerk_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/73927c76-e81c-44b8-bc42-d3ede82e5d81/simcity_4_vs_cities_skylines_2019.pdf
    • https://uploads.strikinglycdn.com/files/15a55719-f4f9-48f9-8bf4-c4726cff99ca/nazixuta.pdf
    • https://s3.amazonaws.com/tokafanawa/wasoxekufuziluloreval.pdf
    • https://s3.amazonaws.com/tazopaju/missouri_river_fishing_report_montana.pdf
    • https://uploads.strikinglycdn.com/files/02985ce4-6dcd-49eb-9a93-b7f8130211e9/93352261841.pdf
    • https://s3.amazonaws.com/loxopudizus/fekabiwebabe.pdf
    • https://uploads.strikinglycdn.com/files/580a549b-1012-4970-88a4-a494ab9346ee/52018207546.pdf
    • https://uploads.strikinglycdn.com/files/326e89d1-b48c-4d15-925c-c33d3a4f2718/32684847846.pdf
    • https://s3.amazonaws.com/vapelurowar/ikea_double_bed_sheet_sets.pdf
    • https://s3.amazonaws.com/gupojakami/masterbuilt_butterball_indoor_electric_turkey_fryer_oil_capacity.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa5.bin
4c3ea93b5ce2ac7f04ee76e5f5059691e65a08c28f14613ef23d1427827cbe3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 5048 bytes

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