Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c8cdc4588cce7d…

MALICIOUS

PDF

61.3 KB Created: 2020-12-17 22:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef9457eb1ff2bf14b50929ed1b10e1be SHA-1: 3a04ab6c63bdc3d7699f2c32f903453bf399edb7 SHA-256: 17c8cdc4588cce7dd3acd2dabab5c760f95c9ee037b61cc00909007681d3c699
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external links. One prominent external URI, 'https://trafficel.ru/aws?utm_term=basta+pasta+menu+nutritional+information', is directly associated with the document's apparent purpose of luring users with a fake menu nutritional information. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://trafficel.ru/aws?utm_term=basta+pasta+menu+nutritional+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446496/normal_5fa94e51edd20.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/368414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_5fb25545eb65e.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/kokovimetibow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f9090425d4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_5fd295db411da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8c8aa97640e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f94ac7cf1ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5fb7be1bac0ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc505c01c8c7413144c6c55/t/5fc906ea2170ab5359ea01d3/1607010028167/suppository_applicator_bulk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc13cf5a97599144e249e04/1606499576901/bisukanemeburibidujove.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe11db3c6ccf69f3264b0f/1606291932345/probability_word_problems_multi-part-problems_worksheet_1_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c38ff13940aa24a8d75/t/5fd21d6b7c12252903fbe308/1607605619869/samsung_s20_ultra_features_gsmarena.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee5fda3719f7373212445/t/5fd683447fc52c2069298b5f/1607893828267/ebby_steppach_autopsy_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/dazamujesududelo.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_off0000b518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB518 5096 bytes
SHA-256: d8741e8eb28dea46233c87924dfdfddaf06df48ca3ed9eea647bf8d27e0e39fc
font_01_sfnt_off0000c654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC654 9748 bytes
SHA-256: a89e6973e2f6400d236f87ad68e0e74c0727536826e32ea0d0577bc67eb55913

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