Malicious PDF — malware analysis report

Static analysis result for SHA-256 808d8c79617c31a2…

MALICIOUS

PDF

74.5 KB Created: 2021-03-29 23:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6cab4ed7a1202798dcc67c82526a71fe SHA-1: 8eaf9e9871e15dfcceb1bd2cb9cf4e548ee9b98b SHA-256: 808d8c79617c31a25ecc1771f6bdd31b3a290beb04be7af90395450d7e16e826
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one URL pointing to a suspicious domain ('soxebez.ru'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=business+goals+1+pdf PDF link annotation
    • http://wapadax.scienceontheweb.net/critical_race_theory_third_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/mGicjae/glider_simulator_cockpit.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/EgdjidN/race_king_2._2_protection_26x2._2.pdfIn PDF document text
    • https://lonugawewubosil.weebly.com/uploads/1/3/4/6/134627014/jezur_koxewaxi_putorobalegid.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/c08006396.pdfIn PDF document text
    • http://raisinshub.pro/ikea_bed_frame_king_canadaks618.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/different_types_of_costing_methods.pdfIn PDF document text
    • http://insta-sale.site/20651331614qc75e.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/g3igiaE/73289488076.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelotosa/heidEhj/11774110108.pdfIn PDF document text
    • http://artelamp.store/nobagedasiwupib7gkf.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/ec95718992.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/ijhaGgh/65790911894.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/4557888028.pdfIn PDF document text
    • http://psyhologrzn.ru/how_do_i_reset_my_maytag_epic_z_washer857ac.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/aYggegi/penegumag.pdfIn PDF document text
    • http://copyright-notice-ig.com/addressing_modes_of_8086_with_examples1v9bt.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/bb9184b7-72be-4ecb-b02a-dd2279fab733/what_are_the_example_of_deductive_reasoning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a06af2-0b1c-4b44-a16f-6d02dd50164a/8972012704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead76929-00f9-49ce-88d1-4982322b905c/alan_watts_lectures_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dffbb34-b2f1-4dcf-8dcd-c8035e3e0306/how_to_put_out_a_zippo_hand_warmer.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_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 5216 bytes
SHA-256: 3d85f9d60ed71d12635332f8f39d53641b4ed1f6e2f9f5268aa27168dc148939
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 10096 bytes
SHA-256: 5433958e483f42dee9dcae857f2a7afcc38076b442b7e569503350fb98214141