Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fedbafffaf448f8…

MALICIOUS

PDF

85.3 KB Created: 2021-04-02 00:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0aee8c96392d8bc26c3bd4e92f86a9ee SHA-1: 54b6ddd32dcbe79e2da03d2c5c3f7925ef8a142d SHA-256: 0fedbafffaf448f88a94276a92e699c9bfd583592fdf002a3bfa25b8d135d079
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/aws?utm_term=excell+pressure+washer+motor PDF link annotation
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/serajofarubujes_bevetinifi_vexafupaz_nobudov.pdfIn PDF document text
    • https://cdn.sqhk.co/vokipidelad/hjd3hhh/63752315863.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/gighgg8/motocompano_route_and_road_trips.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/XcUhcAL/31495176549.pdfIn PDF document text
    • https://roginibexit.weebly.com/uploads/1/3/0/9/130969264/jiberoza.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/KzC9idk/japanese_translation_picture.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/vobizototiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/jjigSii/kinafo.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/bb9f50db-b2e3-475b-9ac4-a12d7a270c4d/why_does_yankee_doodle_call_it_macaroni.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/bilirubin_formation_and_metabolism.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_5a7b7ec66e214506ab4790d9993a965c.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_fbfc893de5e7404292a19223b0a6c23d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/005f3ff6-ef58-43a6-9452-624877a750d7/present_perfect_exercises_online_agenda_web.pdfIn PDF document text
    • http://filawobabadi.epizy.com/bulova_precisionist_instruction_manual.pdfIn PDF document text
    • http://zenejoku.rf.gd/foods_without_grain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94bb9c0-2cec-4f3d-8e7e-d89c226e4faf/how_much_does_a_honda_15hp_outboard_weight.pdfIn PDF document text
    • http://kowefejarozop.epizy.com/post_nuptial_agreement_template_florida.pdfIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_c538f4a07b9a4ccc98ebaa190da9d608.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/kifopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5906783-aa61-4654-afb1-b51541c5b4e3/slingbox_500_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5234378-00d9-4b7e-8e49-faa98d0d713e/hp_laptop_price_with_i5_processor.pdfIn PDF document text
    • http://nemojasa.epizy.com/best_amharic_books_free.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_a88ef34433c242a788b641b012d12fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/2000_dt466e_injector_torque_specs.pdfIn PDF document text
    • http://fesenobonirizu.epizy.com/18382211830.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_off00011040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 5292 bytes
SHA-256: f614d9673a8fccfc5930887018e6ff5f7363f2be1cbda82b0a1d2cef837e892a
font_01_sfnt_off0001222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 11168 bytes
SHA-256: cc0dafdcbf5b99d3ba876c7deb02d3cd100feeeec46163e1f81258027f7e0296