Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e804110f96a185f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-12 19:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f66d05a0bcf20f93dcbcb7ed9944dcdc SHA-1: e8b65b23aa157b8a1cede922ebf15ae1c98a17ee SHA-256: 1e804110f96a185f64a3f495ec005b00c0279ce170d45af1b61687eefcd6fad8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with at least one pointing to a suspicious domain ('ponafet.ru'), suggesting it functions as a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=antifriction+bearings+pdf PDF link annotation
    • https://cdn.sqhk.co/kaxopejitin/difJcia/pentagon_mall_stores_hiring.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/hj4fLpX/monster_manual_playable_races_5e.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/kofasutizivotudadewuta.pdfIn PDF document text
    • http://zazerure.22web.org/kepanojivixolivumopufog.pdfIn PDF document text
    • http://kuvonej.iblogger.org/bivosepa.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/aB0GkWY/addons_for_minecraft_windows_10.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/synonym_antonym_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/y2higjf/quick_easy_vanilla_sponge_cake_recipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1df922-407a-4baa-8bbd-1ed13107fbdf/keyboard_ctrl_shortcuts_not_working_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49af49bb-43a3-4cc3-8b26-6207b34235d2/what_is_the_best_riding_lawn_mower_for_2_acres.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/how_to_fix_insinkerator_garbage_disposal.pdfIn PDF document text
    • http://boxitevu.rf.gd/plus_one_business_studies_malayalam_notes.pdfIn PDF document text
    • http://wazuvit.rf.gd/axios_form_data_node.pdfIn PDF document text
    • http://fagewoxe.epizy.com/miwazuwugorijadewifupex.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/presupuesto_de_capital_ejemplo_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3def00-5cbe-4948-928b-70e5517bd3cf/samsung_bd_j5700_manual.pdfIn PDF document text
    • http://wexejof.epizy.com/badawofagepixaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/sifitinowozoreviwizo.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/69845839484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16333783-26fe-4ed2-aeee-d199d1b5a45f/kajiwerolozinonusov.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_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 5420 bytes
SHA-256: 90f777088bcf8f208e2e17ab264f6f1667c0e57f6a8212a79b716829c955e166
font_01_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 10816 bytes
SHA-256: ab00173a006c0690a856348ee8f5f9b4c70bdfcd5f92d0dd438a3fe310794327

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