Malicious PDF — malware analysis report

Static analysis result for SHA-256 11490c0e4196a22a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 21:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5d0cb68705553f2323f313daae9d62b4 SHA-1: 4920ea1f1533a94b155b409b822f6c94f6b0ecd2 SHA-256: 11490c0e4196a22a24a27e84e7ca55cc40ba1ed4e0489b4ea49933c4768f96ce
166 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, potentially via embedded scripts or by leveraging legitimate system tools. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=pharmaceutical+marketing+pdf+books PDF link annotation
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/juroxageg.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/sibalezinen.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/gonRMxP/orion_theatre_yakima_wa.pdfIn PDF document text
    • https://rezemofojo.weebly.com/uploads/1/3/5/3/135321986/vivuvuxewadexilep.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/past_perfect_active_and_passive_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/4hgjizZ/97334554776.pdfIn PDF document text
    • http://xobilosusi.sportsontheweb.net/american_criminal_justice_system.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/xedepofoserasujaw.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/AIy3ghr/33066948850.pdfIn PDF document text
    • https://cdn.sqhk.co/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf96226-4ddf-4025-9c6e-958a9454ea7e/68555600534.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_9127c2d405e6483bba93660472812815.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_3d9ae5189ed9463a942278fbd3494053.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/is_s_curl_activator_good_on_natural_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/free_form_ngha_l_g.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/cb2422ab-e35c-46b5-935b-d3abe7e1b3fc/tigufopudaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6c9ec8-3951-45a3-9e57-114d48793d00/52251425027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ac6b70-4f5d-4b1d-b055-cc661761b4f1/91901076950.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_385a81af25cc459e836521a764655e25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/14366292096.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/voxengo_soniformer_tutorial.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_49145dc9e2aa4b65802028a5e15ee94d.pdf?index=trueIn 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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5772 bytes
SHA-256: 993dbddcba4060d56e041f60b5204bd0cd3a416c957a0556ab5a4929609f08dd
font_01_sfnt_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 11196 bytes
SHA-256: ad8e9cb87c747d1ae731cb429b8e3bd4364e67305f3201b799b537ab2bb5369c