Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad2b3eefb2f8577…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 07:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d6af31206b0400c265a1855b7342f397 SHA-1: 2380e3debc5a81f75f03708a5bbeb3c091b803eb SHA-256: 8ad2b3eefb2f857783c845840ed78c8f2321d95b0e8b3dcc520b0246799eba5d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely phishing or malware distribution attempt. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this is a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/wix?keyword=liquid+silk+canvas PDF link annotation
    • https://tuxupifogufo.weebly.com/uploads/1/3/4/5/134594750/judazikepuno-kazivanijaguxe-figezonegudiju-daripanopaforep.pdfIn PDF document text
    • http://souve.me/super_stacker_arcade_gameo7kok.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/FhiibaU/zombie_apocalypse_movie.pdfIn PDF document text
    • https://zulemogosisuwo.weebly.com/uploads/1/3/4/6/134689329/7e423beb4a4.pdfIn PDF document text
    • http://busibear.com/92886435358lothf.pdfIn PDF document text
    • http://liketime.online/82126112313joap9.pdfIn PDF document text
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/2946234.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/ogfhjzO/bawling_my_eyes_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/cEziegd/65621448881.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/90140504381.pdfIn PDF document text
    • https://vofitusu.weebly.com/uploads/1/3/5/3/135301199/demolebejaxid.pdfIn PDF document text
    • https://gonokuxugun.weebly.com/uploads/1/3/1/6/131637302/nozido_fixoroxe_sojopese.pdfIn PDF document text
    • http://oneitstore.pro/nenerawadqwm.pdfIn PDF document text
    • http://worldthailand.fun/56716046340s7bj0.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/xijufusezosadi.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/2962953.pdfIn PDF document text
    • http://zedateve.mypressonline.com/career_aspirations_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/dhh18ia/kikapet.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/triple_column_cash_book_questions_with_solutions.pdfIn PDF document text
    • https://nujazovarurep.weebly.com/uploads/1/3/1/8/131856890/5132049.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/sibjdjj/sulinipaluvadabeteragagu.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/a0f0f6cb-3b55-45dc-8684-ae197f9426cc/bissell_powerforce_compact_1520_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e860f1cd-5cdf-4b68-ac3c-f30b0b0bd568/el_pollo_loco_menu_megamall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f597ea-a019-4a2e-a47f-98b762baad9a/under_the_banner_of_heaven_review.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_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 5028 bytes
SHA-256: 7a2ccd527c203bf711f9dd0d8df7422a5a523e2de0a4066e40e088e0d597888b
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 11020 bytes
SHA-256: 6a2f183afdae4992558e082130a59eb9851aef2de597fb75ddb9e32deb1add89

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