Malicious PDF — malware analysis report

Static analysis result for SHA-256 568cc6d55f75fd5d…

MALICIOUS

PDF

72.8 KB Created: 2021-01-06 02:37:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db964a1fa121b2720494a2a575bf8b52 SHA-1: 7b0164f5105e51c396c6c470a66aeb18badc6d45 SHA-256: 568cc6d55f75fd5ddd17fddc0ea44e206e0d0634beb99283a18ba80d37628d5d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a specific heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are related to 'trafficel.ru' and a Weebly hosted PDF, suggesting an attempt to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the presence of numerous external links points towards a social engineering or malicious redirection attack.

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://trafficel.ru/aws?utm_term=flight+666+imdb+parents+guide
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/43d9a9d75e6d6.pdf
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f9c6c4b66bf4.pdf
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/4045648.pdf
    • https://wefisejeradez.weebly.com/uploads/1/3/4/8/134886640/5be0fe794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/moduxanakuri/nusuxujagakafam.pdf
    • https://s3.amazonaws.com/xifabilejilab/kia_telluride_2020_lease_deals.pdf
    • https://uploads.strikinglycdn.com/files/09b9161f-cb90-4a83-a306-50d2e1b85ed2/penijumedavu.pdf
    • https://uploads.strikinglycdn.com/files/5afd9a4b-842d-4dc1-b6a2-9521814f5d85/national_mental_health_registry_malaysia.pdf
    • https://uploads.strikinglycdn.com/files/18db4a46-d177-41f1-a199-f741fd73b61d/24525030588.pdf
    • https://uploads.strikinglycdn.com/files/56663486-5b1a-45a9-96aa-6cf9ade9cb24/watch_baaghi_2_online.pdf
    • https://uploads.strikinglycdn.com/files/61cd42df-332d-4921-9588-8ad281619ce1/mobilden_bedava_misir_blgrsinde_por.pdf
    • https://s3.amazonaws.com/vabemavuputenif/1466502326.pdf
    • https://uploads.strikinglycdn.com/files/de74a6f5-012d-41c4-a404-e4c0646b4962/xelososirimolozimarewiv.pdf
    • https://s3.amazonaws.com/leguvefu/zifazilodanawuxuze.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_off0000ddaf.bin
e1479734fc4f793d79716e2b1a4b139dd551a72e2286947681762e91b2c972ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 5620 bytes
font_01_sfnt_off0000f096.bin
27cbde1977ba742068e41a1c3d97cdda2762b8f134ef3735724beabfc9d96694		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 11004 bytes

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