Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98abea854f9f30e…

MALICIOUS

PDF

75.1 KB Created: 2021-06-05 17:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ba3233407f9d70cb832c9403e7f0b8c SHA-1: 11d625d35132c552befe675c4a520a22a681d4f7 SHA-256: d98abea854f9f30ea9987fe33cbbbd93c25971087800ea10c4c983345886309f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/pbw?utm_term=sniper+3d+assassin+hack+game+free+download PDF link annotation
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/xomejebenolu.pdfIn PDF document text
    • https://vipinilanevam.weebly.com/uploads/1/3/4/8/134873552/rafavadumov_jilep.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/jominosawatusadi.pdfIn PDF document text
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/918cdb151c91.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/3a69b2ce-ce4a-4e6c-959b-72bd0207db68/how_to_position_furnace_filter.pdfIn PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144613788/rapport_de_stage_banque_socit_gnrale.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/f/paxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668c036f-aeea-456b-a64d-35d33a5238e4/basic_physics_a_self-teaching_guide_3rd_edition_wiley_self-teaching_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25fa9b2-2f8d-470a-98b6-22e99e83482d/the_birds_are_singing_at_night_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d1f79e-09a1-4632-824c-7bc24e5e4bcb/fojilepidawipelamoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9b3a26-5276-4fb2-95e9-250aac4b41d1/30109876205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352f6998-0cb0-4324-8d2f-992b11ff68c8/sedomiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52bf7799-98ad-4f1c-b422-1188a4db7705/99959729196.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/witcher_books_the_last_wish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53457ef5-71f7-4a26-9a20-76ae5e0087b1/how_to_make_cable_remote_control_tv_volume_spectrum.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/loteria_del_abecedario_para_imprimir.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144561672/27719922192.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/boledenexalovosubasufut.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/w/file/fetch/144626781/bubudunofitejijarotupom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c414805c-1e40-4217-bbbc-6c0594e3935f/wuledejejefowe.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_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 5992 bytes
SHA-256: 1e4d767b77a9955a2d327ac75ffaa52098d3a4160005d3c06604e67b7f3d1845
font_01_sfnt_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 21752 bytes
SHA-256: 38a082b6ec23b5d11402135ffa2f47428cf5dd0c1d67e2b09bb0c379093cad55