Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccc7830c894336f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 00:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c11af8b6bad69b4a5eeaab6ffdac20 SHA-1: ed895ca1af809c187a29ff3c86ae12613a0c9dc9 SHA-256: 4ccc7830c894336f9ba3e9e4edd67798282593360bc303e5da32b498bafe9d62
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to redirect users. The primary URL, 'https://ponafet.ru/award?keyword=advertising+and+brand+management+pdf+free+download', suggests a lure for users searching for specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/award?keyword=advertising+and+brand+management+pdf+free+download
    • https://xuwawimo.weebly.com/uploads/1/3/0/7/130739806/kamupinaxiw_wizizan_dosexe_balajilobod.pdf
    • https://cdn.sqhk.co/putizimetiwe/iiaiCWQ/fekenivepizerukorimodi.pdf
    • https://cdn-cms.f-static.net/uploads/4390052/normal_6031df08a85dc.pdf
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/xuvigadeli.pdf
    • https://cdn.sqhk.co/bivuwusim/idt5haW/xerazevozopelukipidumif.pdf
    • http://kopuvimu.scienceontheweb.net/the_body_electric_yoga_facebook.pdf
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fe5057d1fc19.pdf
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/xijewe-jitunitipeku-donumub.pdf
    • http://terugate.mypressonline.com/what_does_los_amo_a_ambos_mean.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_602b35f4dc6c4.pdf
    • http://memowelubi.mygamesonline.org/78212535781.pdf
    • https://cdn-cms.f-static.net/uploads/4463002/normal_602a8baf5f326.pdf
    • http://gifipagi.22web.org/bed_sheet_washing_near_me.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_2314018d74c6498e8b9d28ba492c2919.pdf?index=true
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_82efffea65ce41b6893ecb4fe3de973e.pdf?index=true
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_56cb145fdd3e409e919f623299510376.pdf?index=true
    • http://vizokipinebawik.rf.gd/funny_journal_prompts_for_adults.pdf
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_12f2c7dfb8d54da49795f9cf511ac4de.pdf?index=true
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_962321d196be4ed789e24a41be7e2e75.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f894.bin
4548693729b0f51c828c06f3475f53e720695d464fa9c9a668d3c7d07a4a2cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 5644 bytes
font_01_sfnt_off00010bc4.bin
e4f1ea07f77d4d43e08e4b3bf0d4cc29ffd0bdc8866385ad6ddd04f6ab52615d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 10912 bytes

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