Malicious PDF — malware analysis report

Static analysis result for SHA-256 d072fd99fe3fc204…

MALICIOUS

PDF

91.5 KB Created: 2021-03-14 09:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 002f3cbe055b3c915a8fbd3a14fdd0ca SHA-1: 267695e6dd0df6a39d199a41fc3cf3197096cd36 SHA-256: d072fd99fe3fc204af0f4fa032e8a7d2ef26045a8cfb35f54b6c73fecdbe51c6
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common tactic to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=jacopone+da+todi+donne+de+paradiso+pdf PDF link annotation
    • https://cdn.sqhk.co/putizimetiwe/gioP7Vp/91781925235.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/vubamarixaxu.pdfIn PDF document text
    • http://cabinetshub.xyz/kubota_zd326_owners_manuallwmir.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/jgXO0ge/767620208.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/98l5gfI/commuter_rail_boston_to_salem_price.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/tulsian_accountancy_class_11_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5fe7bc37b7671.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/gjiDG6X/psx_emulator_pc_windows_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_604d95d1ab763.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/kanizojirevabikatego.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/iDjbqxr/amazing_gangster_frog_simulator_city_download.pdfIn PDF document text
    • http://www19216801.site/kebunaporifuxavixefv2ytn.pdfIn PDF document text
    • http://vorgazme.com/footlocker_marketplace_mall_rochester_nyk787j.pdfIn PDF document text
    • http://newyearshop.site/gowotuzifonujowe82r9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/nombres_de_jess_en_el_antiguo_testamento.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/19013477746.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/report_injured_wildlife_townsville.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/payback_english_movie.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/penguin_anthology_of_twentieth_century_american_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/50054116134.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_off0001275a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275A 5104 bytes
SHA-256: ec94ded8101e9146ad8b060e2bf36c81bef4c3a86ee2654fb70944c7c9db704e
font_01_sfnt_off000138ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CA 11920 bytes
SHA-256: 8404527bd1b3db3f6f15ea6242933e6d4a3ce0a6e83f01e9edba55438a29629b

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