Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f13e43006d34bce…

MALICIOUS

PDF

92.5 KB Created: 2021-03-30 19:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 54626978bf94f27b913e1724fda2139d SHA-1: e17e63e9448247ad74de468554927327c4c88579 SHA-256: 2f13e43006d34bcede2b99b2f18e3f7010c18e46e5dcd223af48713ce2ed991c
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain search-like queries, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+much+do+visiting+angels+make+per+hour In PDF document text
    • https://wibabuxef.weebly.com/uploads/1/3/1/3/131380054/3890713.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/kokawo_diwawuboxim.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/definicion_de_leche_materna_segun_la_oms.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/5816209.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/rebexumabopodenujikemitat.pdfIn PDF document text
    • https://sarofosifuzatu.weebly.com/uploads/1/3/5/3/135329924/85a6b8d84aa30bb.pdfIn PDF document text
    • http://lavumosilewu.22web.org/58915974676.pdfIn PDF document text
    • http://naturebiolog.fun/philips_series_5000_beard_trimmer2gis3.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/essential_hypertension.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/2007_honda_civic_si_coupe_owners_manual.pdfIn PDF document text
    • http://dnepr24.info/pdf_to_image_converter_portablesj1dk.pdfIn PDF document text
    • http://lifeit.pro/can_i_use_jolen_creme_bleach_on_my_hairdum4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofunuxemijowex.rf.gd/vefomizifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b353a494-1829-476e-96b7-fa92254121a3/jivoroxajalozutuwifo.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/pune_detailed_map.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/the_love_dare_day_20.pdfIn PDF document text
    • http://rasezufolob.rf.gd/lofujuwaxudibezelano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e771a7c-e742-4bfd-9c17-a3b5a32104b4/the_fallen_series_sniegoski.pdfIn PDF document text
    • http://mewozegi.epizy.com/barilla_tortellini_prosciutto_e_formaggio.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/binks_model_7_spray_gun_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ecc71d-5eab-487d-b8eb-494724c299a1/saeco_coffee_machine_for_sale_melbourne.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_off00012ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD4 5664 bytes
SHA-256: d539aeb01be3effd27d3a6ad104f9579afd82ad5d3c2dd87564c8770af712279
font_01_sfnt_off00013e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E06 11308 bytes
SHA-256: e45dea080f57bf824b6aa4c721f8e81ca59ea5fa29b6c38bc84353d11feb35a2

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