Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeaeec8a5d6e862…

MALICIOUS

PDF

83.5 KB Created: 2021-04-05 04:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7450eba6169ecd9af2b711531a804f46 SHA-1: 9c73904f52c22fe1a4310bf5858dd0b761bddf9e SHA-256: 8aeaeec8a5d6e862bc29d5428bbce96ceb1c62df4a194041a9da1d179cd5fc37
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://dugedepap.ru/award?keyword=ascetical+homilies+of+saint+isaac+the+syrian+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372681/normal_60265a2b3c1df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fd3a17b251d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_6059b273118e3.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/86311118160.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/hypertrophic_cardiomyopathy_esc_guidelines.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/forms_and_functions_of_nouns.pdfIn PDF document text
    • http://nofubajabuv.medianewsonline.com/kogaxovefovuwuzefilodek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_6040e4444a2ce.pdfIn PDF document text
    • http://lazinuno.scienceontheweb.net/nusagovol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6022affb60588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fe7852846cb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413573/normal_5fc5f7397c1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_6058a0b985338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_5feb6f6ad3d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_605fdd7fc27db.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/epson_workforce_600_ink.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigutun.myartsonline.com/96740453647.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/arabic_numbers_in_words.pdfIn PDF document text
    • http://nakogis.myartsonline.com/biosynthesis_of_bacterial_cell_wall.pdfIn PDF document text
    • http://womumilo.epizy.com/99185868871.pdfIn PDF document text
    • http://kewugozosefo.epizy.com/tatalaksana_meningitis_tb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad77ecea-c6aa-4acd-8f70-ad36c4cdbf8d/military_alphabet_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93fadcb0-847a-47ff-8d2d-b579f508755b/singer_4562_t_bobbin.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_off000106c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C8 5484 bytes
SHA-256: 1b4dbda353f901eb6bfc798c33c2a3f3c7e3c90c46febd98f7328e7c2533c81e
font_01_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 11648 bytes
SHA-256: 47bcf173489ca0dfb33078624dfbed639e20521b3bbbbb278184e0b9e3a94613

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