Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e4706944c06c96…

MALICIOUS

PDF

77.2 KB Created: 2021-04-08 04:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 613dfffad742b0afa082c1017ec61e26 SHA-1: 89cdbf006935949adff2ba78f187a290f922590d SHA-256: 87e4706944c06c96e2d3471f0e8cf90894cd97f6b4f670506228cbc689f4b193
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=unblocked+games+zombs+royale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401538/normal_5fedd5ded7c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_601dc529c8226.pdfIn PDF document text
    • https://lafivejazep.weebly.com/uploads/1/3/4/7/134771341/makijo_zuseba_semamev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465919/normal_5fcc5caf96639.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/77706067428.pdfIn PDF document text
    • https://cdn.sqhk.co/falunibesedo/e20hfUj/66282434831.pdfIn PDF document text
    • http://clebohets.xyz/brain_memory_games_for_adultsb6fy3.pdfIn PDF document text
    • http://creditinquiry.info/evinrude_e-tec_60_hp_service_manualuqgo2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fe87f9378a3e.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/ewicTgi/hideaway_pizza_owasso_delivery.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/liebert_gxt3_battery_replacement.pdfIn PDF document text
    • http://leftoutclub.com/atif_aslam_song_dekhte_dekhte_pagalworldnxuy7.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/110092.pdfIn PDF document text
    • https://raduwefun.weebly.com/uploads/1/3/1/1/131164260/9067455c.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/gencTb2/xujusemofidik.pdfIn PDF document text
    • http://vehicleinsusa.com/archeage_unchained_leveling_guide_2019nytdu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_6021cf8954294.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_bbbcd7a7574048e3a4022635d6396d53.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_7771e0b8687b4abe83c7fb21246f7f2d.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_60c16c85556e4d2fadd0b11754d1d3de.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_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 5608 bytes
SHA-256: ab58e84dca57295da43aeec5f65190ebd4fa59f9a9d7f4f3fd1d5407d1de8a15
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 10756 bytes
SHA-256: 6f67ea200caede745680d2858e1d154491449408b9b8f32145d96bf432ff5c04

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