Malicious PDF — malware analysis report

Static analysis result for SHA-256 2975dbbad0e108c2…

MALICIOUS

PDF

77.9 KB Created: 2021-03-21 07:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3a1e44dd9d6071055270faf207f523e3 SHA-1: 20413cabd4ce56287fc5e03b96c3634c78fede9f SHA-256: 2975dbbad0e108c2897281a21e4fdbec30a0b5bfe7b817b489f217dcff28bb80
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and includes a UTM term suggesting a 'body reset diet'. This indicates a likely SEO spam or phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to drive traffic to malicious or spammy websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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://ponafet.ru/strik?utm_term=body+reset+diet+pdf PDF link annotation
    • https://cdn.sqhk.co/xewimoziwuvo/Tzhfhdh/punch_sound_effect_button.pdfIn PDF document text
    • https://duxotitur.weebly.com/uploads/1/3/4/5/134596147/pumodorufowav-japubuzagiri-fodav-wokovuzija.pdfIn PDF document text
    • https://cdn.sqhk.co/waxixojapu/ej6gihe/87928280752.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/vorilixofagimo.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/eM4hiUf/zombie_derby_2_hacked_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/Echhugh/dipebowerige.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/LibghQM/space_rangers_2_reboot_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/hhha3gi/93552561416.pdfIn PDF document text
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/16a37c.pdfIn PDF document text
    • https://dazobexureza.weebly.com/uploads/1/3/1/3/131383777/6470513.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/kinomuduxe-wakisowu.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/KUuhjNu/4runner_towing_capacity_by_year.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/iajfhgw/modern_era_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/e5jck1T/mascot_dunks_from_three_point_line.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/206e1ae3-a106-44b3-b142-ededd2f6f519/how_do_you_disable_a_viper_car_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81506e2e-a896-4ce8-8e08-3f250c3219e9/37600684718.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/google_assistant_apk_for_lollipop.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/aquarium_screensaver_hd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8970b2a8-7d55-411c-a3a5-4a229c3ff54a/pumuvusadasonasebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b423b13b-4f8a-421f-b75d-105aa8a432e0/74124100186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24c4e6d-5014-4a8f-8be8-67691e23680f/magnus_chase_and_the_sword_of_summer_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/61249264522.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/kuwogisedituraratirikewo.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/biology_corner_diffusion_lab_answers.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_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 4944 bytes
SHA-256: f9ca3e479da3b96fc19d11e7871b4f37aab48b4851418e8a7a7c77af3dd884d1
font_01_sfnt_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 11088 bytes
SHA-256: 659206cfa23bb9b69801d2b0b15142eab148b851fd8f84e03ae9cca8d6f278bd