Malicious PDF — malware analysis report

Static analysis result for SHA-256 f015b15b6671fa63…

MALICIOUS

PDF

83.6 KB Created: 2021-04-10 02:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a988f90b179d4e03d430f989eca79335 SHA-1: 2bafea0893679a0604803eca99db08a7d1ac853c SHA-256: f015b15b6671fa63788c6edbf0dc9da8255eac82e1c5acde6281a6c0a3662f89
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to lead the user to a malicious site for further exploitation. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=who+buys+rare+books+near+me PDF link annotation
    • https://zolekifez.weebly.com/uploads/1/3/4/8/134850144/pedizazozomefumej.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/wixapiseto-fabuw-wifupozu.pdfIn PDF document text
    • http://my-favshoph.online/42318292539ikl5h.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/mekodebole_jogugimerutiz_vowaxe_vogukifewem.pdfIn PDF document text
    • http://xozonline.ru/89223034717fwvvq.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/ib_further_mathematics_textbook.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_to_program_a_universal_remote_without_instructions.pdfIn PDF document text
    • http://reduslimitalia.website/laxuwebiwuq7vnq.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/wNhdWhh/28600328567.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/lesson_plans_for_english_teachers_freemzqcp.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/hheTgcw/33270896542.pdfIn PDF document text
    • http://bachanalytics.com/head_first_javascript_programming_eric_freeman459kk.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/81208372848.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/vagedogoweg.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/wukagajoguno-venetifa-tetataxub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/megujobemegor/nesco_18_quart_roaster_oven_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733f1737-8ade-40f7-afb9-0ea5dc90be24/how_to_program_a_universal_remote_to_a_olevia_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/2018_subaru_forester_2.5_i_premium_standard_features.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/55498634074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f175ce-5887-43bb-a13d-fa6ac4c867f0/what_is_3_days_of_mourning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37e8ae7-cf4f-49dd-8a2c-91866660948b/wetipurawesakij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a71948-2fc3-4b26-baee-2df2a592fd0a/is_pokemon_sun_and_moon_a_reboot.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/tarot_spreads_for_future_events.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/simple_marketing_action_plan_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 4964 bytes
SHA-256: 152b73af0368c88357512e0818282de5b931db57f8172c11d161e7922cfee137
font_01_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 11092 bytes
SHA-256: afd2cb49f4b6ab787fb5f3b2939f0be93bd22fc46becadeb2655fa4fdfaabf78
font_02_sfnt_off000132db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f