Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fb8d1e14ef259e…

MALICIOUS

PDF

66.4 KB Created: 2020-12-20 13:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b5a63389f141564c60627a93d55476d SHA-1: 3801dcf4d5c96503330ae51e025f335f467bf7a0 SHA-256: 30fb8d1e14ef259e7b84cf4bb6b52106812fce7a2285645c8efbb6394568de8b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Garmin forerunner 110w', suggesting a lure. The presence of ClamAV and ML heuristic firings, along with the critical PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM findings, strongly indicate malicious intent. The primary malicious URL identified is https://cctraff.ru/strik?utm_term=garmin+forerunner+110w.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://cctraff.ru/strik?utm_term=garmin+forerunner+110w
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/moxokubiva.pdf
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5fa3a6cb79e4f.pdf
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/gonodurisajofu-fedisojubomu-biwuzefoxafati.pdf
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/bukarolarugod.pdf
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd6a028b52a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2a02a311-83cc-41e1-849c-e01a74c31123/deliberebirovopuxibis.pdf
    • https://uploads.strikinglycdn.com/files/f9f1f6f0-3642-4127-87b2-3260f4627074/eden_elementary_school.pdf
    • https://static1.squarespace.com/static/5fc5b7d0ab79f442f24a7d59/t/5fcd50d0e43f2b00a8b7bf0e/1607291089760/toca_lab_elements_guide.pdf
    • https://uploads.strikinglycdn.com/files/da6628fd-dac4-435a-8c55-82297d04dcde/basic_grammar_book.pdf
    • https://uploads.strikinglycdn.com/files/23b8fa2a-7475-4ddc-aa13-48ab3af34eeb/tumuwoluwegibizivufutiv.pdf
    • https://uploads.strikinglycdn.com/files/52cc0067-39aa-46ac-b853-838b221faa98/spreadsheet_for_lottery_pool.pdf
    • https://uploads.strikinglycdn.com/files/d08f8e28-dc90-40fd-9cce-e72bd9082f7f/dewaxafogiwujol.pdf
    • https://static1.squarespace.com/static/5fc53da9affbf90a66070036/t/5fd7104f0f11661d4c438b7a/1607929937315/44122049219.pdf
    • 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_off0000c6a6.bin
81bdda72e60ea43c6708aa3a965e07576516fb5104d356fa5c3add5cb0f01d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A6 5020 bytes
font_01_sfnt_off0000d7bb.bin
4e820ebbe71b9b8b28d8e8cd96bccf8a32452f17a24af8ada59bca734c5192fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 10956 bytes

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