Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6f9d4e8ee54357…

MALICIOUS

PDF

88.7 KB Created: 2021-06-06 02:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39452d3da90caa16443c68c64e757754 SHA-1: 6aee76502c7a0c46c9208db2ad4ed92c66dbbac8 SHA-256: 8b6f9d4e8ee5435710c6fb1af65a3d0909808f95747811bb8345477c913d5138
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or link-farming attack, indicated by the heuristic PDF_SEO_LINK_FARM and the presence of numerous external URLs. The document body, though partially corrupted, suggests a lure related to Philips TV settings, likely to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly support its malicious nature.

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://crewmak.ru/pbw?utm_term=how+to+turn+off+standby+mode+on+philips+tv
    • https://mopobaseburole.weebly.com/uploads/1/3/4/8/134859053/jujodepesuma_wefefaja_xepamubi_divejefo.pdf
    • https://cdn-cms.f-static.net/uploads/4405945/normal_606d17cab1f9d.pdf
    • https://xagiwejobumumok.weebly.com/uploads/1/3/6/0/136051235/7948d470b5.pdf
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/vezunatomeropezuwula.pdf
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc8d96c22698.pdf
    • https://paxuxavige.weebly.com/uploads/1/3/4/3/134373921/b667e9.pdf
    • https://ruvutitijo.weebly.com/uploads/1/3/4/8/134883381/sedurevi.pdf
    • https://cdn-cms.f-static.net/uploads/4421352/normal_6056a8d709e1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4ff99d6c-9926-47a2-ad5a-2480f64b18a1/fewegovinotilaxib.pdf
    • http://bemulopawed.pbworks.com/w/file/fetch/144566631/fahrenheit_911_director.pdf
    • https://uploads.strikinglycdn.com/files/2db3864d-d50b-4e40-b0be-020be5e121c0/1016584339.pdf
    • https://uploads.strikinglycdn.com/files/328c6254-1657-4211-ba0a-1fe45a11ad0a/90355791559.pdf
    • http://wuwazilizos.pbworks.com/w/file/fetch/144424332/3d_map_generator_-_terrain_from_heightmap_free.pdf
    • https://uploads.strikinglycdn.com/files/f6b9a67f-0be1-4241-8597-6991ff8c945c/90974045234.pdf
    • https://uploads.strikinglycdn.com/files/c071bcd6-3e2e-413c-a0ab-103995382e4a/94844001440.pdf
    • http://nilanom.pbworks.com/f/how_to_make_a_dog_house_out_of_pallets.pdf
    • http://fixulirulafa.pbworks.com/w/file/fetch/144656070/51776541207.pdf
    • http://sodopateduke.pbworks.com/w/file/fetch/144424710/75349260745.pdf
    • https://uploads.strikinglycdn.com/files/8f7d6c48-b634-4f24-a2b0-ba0aa076e64e/kitchenaid_stove_top_customer_service.pdf
    • https://uploads.strikinglycdn.com/files/252bc39d-5c19-447c-a8ab-381e30c28ced/59274030571.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_off000119f4.bin
1ec852adeb1de4174884c22d9be4e9ecc2e1f583e4e9b6c74272d49d1ae57f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 5636 bytes
font_01_sfnt_off00012d07.bin
c1352b81953fb68e22dc93b97598dcd66c7189f56a39b9f0d3b481013fa4eb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D07 12252 bytes

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