Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6c08b4903fd5be…

MALICIOUS

PDF

73.3 KB Created: 2021-02-27 10:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: a98df64d372f2717c351a090528f8c0b SHA-1: b06388498b3a8cb2d3cdc757abee47e3ac1c8553 SHA-256: 8f6c08b4903fd5be9a8bc96f8e884e9436eaf25ba650a17c9e55093c85953e7a
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://ponafet.ru/wb?keyword=how%20to%20reset%20oven%20temperature PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ff3ddb442b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_5fd838f1eeea8.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/xenisowakegixuputuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486522/normal_602b527379454.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/derecho_romano_margadant_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/ifidgfA/28081892730.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/your_health_today_6th_edition_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/fid43JA/terminal_emulator_for_android_jack_palevich.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486220/normal_60025ff692a3d.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/nifaxezizoxoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_603062b63c2ef.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/hcYiaAD/1385057238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412382/normal_6001d8ed4a72f.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/lidapuzajagadowedugep.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/famine_affluence_and_morality_sparknotes.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/tabupunofipaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bototiluwoge.atwebpages.com/honda_gx340_engine_parts_manual.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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 5044 bytes
SHA-256: 446b5d0401bacfd4b59e7e55930c060d5f4bef09a4acd0b5171eb311cc8c3c6f
font_01_sfnt_off0000f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 10468 bytes
SHA-256: 03bed75a04d199b73fd603a55a1348fdf6209abb3215ee1fc6ff36b3a6f68b74

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