Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b42272d778c961…

MALICIOUS

PDF

70.9 KB Created: 2021-03-08 08:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ea76422258958920c0428ae125539a5b SHA-1: 61cedc0a282d9d1023761067b885ec03cd522470 SHA-256: a8b42272d778c96145fcd36a0a1776bb2ff61850d935d9aa4296de3b8461b14b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=words+that+start+with+gh PDF link annotation
    • http://dnepr24.info/diy_childrens_spider_costumepscbr.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/ggwOhaC/nintendo_switch_just_dance_phone_controller.pdfIn PDF document text
    • https://jaxipalat.weebly.com/uploads/1/3/4/7/134746428/lujurovabojukaw_filiferowuxab_lofopozewelun_dokujodirasin.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/tavefe.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/jihD4jh/ww2_combat_flight_simulator_games.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/hdijjfb/bakixategutugomaku.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/losir-nenuxodo-jedewikebubi-suvon.pdfIn PDF document text
    • http://bitcoins-profits.com/sefipifofenoles2qnje.pdfIn PDF document text
    • http://ideal-it.fun/lolesarusokesed07kts.pdfIn PDF document text
    • https://lufakonu.weebly.com/uploads/1/3/4/7/134711707/dawotijebubedubiv.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/jjkhhhg/yora_multiplayer_rpg_games.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/jamituv.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/nosovitutinud.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/1d193519ff5.pdfIn PDF document text
    • https://towutibe.weebly.com/uploads/1/3/4/0/134012467/3942627.pdfIn PDF document text
    • http://virnet77.ru/rxprep_2017_free_downloadia3np.pdfIn PDF document text
    • http://2220202.ru/why_does_my_delonghi_coffee_machine_leak_water94y88.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/87c9bada99.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/1795d1ee-7a58-4a02-9519-497765bfda8e/how_to_prepare_for_hr_admin_assistant_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0090f5dd-c7bd-42aa-b8a0-ab5499cb5b9a/is_pet_friendly_stores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4afc2709-2d32-4bcb-a7d7-a309760516e0/sketchup_free_download_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a904c8-d990-4536-96b0-14d4924608ad/57481570129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5273e018-cb41-4aa8-b7ce-08c8586a0481/lenuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33cb08ee-4423-4de4-b511-6ce250ec6ee3/what_is_the_religion_of_taoism.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_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 5160 bytes
SHA-256: 5677db761b73a8467ea277d95746624892adc91d1d31aa390fd048db211b5bd6
font_01_sfnt_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 10452 bytes
SHA-256: d24e7d7b5be726b34511a0b0c21c82a7901fd9680679593d7c31bb2ef79e0e49

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