Malicious PDF — malware analysis report

Static analysis result for SHA-256 8504b8318f7c7228…

MALICIOUS

PDF

94.1 KB Created: 2021-03-08 19:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e8a04c49b7baad7ba21e6865336d51f0 SHA-1: 6edf042b8d71bb9954b35ee1f8b9eb779466c6d1 SHA-256: 8504b8318f7c7228e97a3dc7bc0984cf48d7961cfafcbe5512f1eca2ac7f8676
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/123?utm_term=aditivos+alimentarios+cubero+pdf PDF link annotation
    • https://cdn.sqhk.co/povuguzuloga/hfifGjd/sms_business_card._sms_mailing._chatbot_whatsapp._com.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/delirium_lauren_oliver_film_streaming.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/67157792132.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/w7Sagfx/73927396213.pdfIn PDF document text
    • http://luzibis.iblogger.org/ahora_dice_ringtone.pdfIn PDF document text
    • http://bitsracing.net/can_you_make_tapioca_pudding_with_evaporated_milkwmfx5.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/11624179432.pdfIn PDF document text
    • http://antonioit.fun/does_kenmore_elite_dishwasher_have_a_filtersk3qm.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/Kdjdxhe/diners_club_card_rewards_program.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/taylor_ice_cream_machine_parts_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jozunufap/9kJhcc5/15677769536.pdfIn PDF document text
    • http://parkji5x.xyz/sapiens_senai_unidadesy4pwk.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/vewuxelafer.pdfIn PDF document text
    • http://xepivutede.22web.org/angioedema_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/cjjhclu/8758382730.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/xazubeguxaziwelejexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vesezibasesize.epizy.com/64314417404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c09a22d-6ad4-4b03-955a-386bc48e3b34/tp-link_tl-wdr4300_repeater_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906d13cb-802a-4f69-8290-5f66abda3769/critical_review_of_a_qualitative_research_paper.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/will_you_please_be_quiet_please_raymond_carver_summary.pdfIn PDF document text
    • http://ripofosefalub.rf.gd/kitchenaid_burr_coffee_grinder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c59b9cb-2b3f-41f8-9aa6-9d60aeff1866/48474897986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b293e8-6f44-40be-a0ab-aee6fb90a26d/69079104089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a289ef5b-b8d8-4998-b5bd-035ddfe409a4/what_is_fox_news_doing_now.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/37603590163.pdfIn PDF document text
    • http://dapepefoga.rf.gd/android_file_transfer_mac_os_10._5.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_off000131cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CD 5488 bytes
SHA-256: eb38e3e28846eeda8d0afb6b3d56a8fe7cffdc5c2b19aec1a05ebbd21663da9e
font_01_sfnt_off00014465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14465 11212 bytes
SHA-256: 007d0c52f4bea24f766ab0d73ca8b0b262cc3aad1139d1495f67b5e03bdca260