Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4e54fa0805e0ee…

MALICIOUS

PDF

84.6 KB Created: 2021-04-11 23:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a244900d62a9ceb7af215d16bdfb442c SHA-1: d0520b8f22d9b160f9cbb5862caef8f713fff025 SHA-256: 0e4e54fa0805e0ee11b72b05fe49900b788651c69596550823d7fd7054f4c2bb
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to direct users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=how+did+the+magna+carta+influence+democracy
    • https://cdn.sqhk.co/zexoribuj/gihdhci/lethal_weapon_1_mr_sniper_sir.pdf
    • https://rajuwirorevub.weebly.com/uploads/1/3/5/3/135306937/2224786.pdf
    • https://cdn.sqhk.co/xibidodoko/nkja5hi/tap_tap_tap_lyrics_meaning.pdf
    • https://cdn-cms.f-static.net/uploads/4453732/normal_6066271a3fe39.pdf
    • https://cdn.sqhk.co/nurofiwele/QNiggf3/original_donkey_kong_game_characters.pdf
    • https://cdn-cms.f-static.net/uploads/4374953/normal_603263e080f77.pdf
    • http://aydym.club/286311130507lulq.pdf
    • https://mipekemodowopu.weebly.com/uploads/1/3/4/5/134584650/vufixeziroso.pdf
    • http://jobauthor.online/83306212526resym.pdf
    • https://samojosaletope.weebly.com/uploads/1/3/4/0/134017273/23da3cd0.pdf
    • https://cdn.sqhk.co/petawelesup/hgghjEk/computer_network_diagram_software_free.pdf
    • https://cdn.sqhk.co/tixunudixa/g8rNdgg/23197457052.pdf
    • https://cdn-cms.f-static.net/uploads/4451737/normal_603040b2189cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_d411f5b3a3ad47b4a084c2b26af2ccf7.pdf?index=true
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_8f90752f3fb9430a9e5f3700770e56d8.pdf?index=true
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_c5592e312ac54d55a8d2fb35e8228653.pdf?index=true
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_26fdfb38c6e6488fa73dd9927cafebef.pdf?index=true
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_92fd08420fb64616993a7002846d56d8.pdf?index=true
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_5d340a6b6b7f497dbe58b669f6b40e22.pdf?index=true
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_f0bdce4cfb0b40ce8144f106293592c5.pdf?index=true
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_f81924e426974732b040b33033806961.pdf?index=true
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_b46d0dc6f0bf4923a0029456d4ff6694.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f786.bin
a849ed65a7308a245eef9ddb294f988587e51de9039caeebe49b84221f73d3f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF786 5412 bytes
font_01_sfnt_off000109d8.bin
7833ff8de52fa32c3c34d4cfacad7c72780225757643ce99d2d26828d92efda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109D8 10848 bytes
font_02_sfnt_off00012f28.bin
00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F28 16140 bytes

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