Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ec5c3460d8d049…

MALICIOUS

PDF

78.4 KB Created: 2021-02-23 19:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 710f5670652125d2348f289a5a597a22 SHA-1: c67d5945b47789ac1b31c52cd9fcc49fdf8eabd3 SHA-256: b7ec5c3460d8d0499bbc583884d6562f5d2f90455fa833ca061526df7aa83b62
284 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm designed to lure users to potentially malicious content. The presence of a redirector link and the ClamAV detection further support its malicious nature. The document's structure and the heuristic firings suggest it is part of a phishing or scam operation, likely attempting to deliver further malware or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/123?utm_term=storcenter+ix2-200+firmware In PDF document text
    • https://rogixatig.weebly.com/uploads/1/3/5/3/135323026/2801345.pdfIn PDF document text
    • http://myluckywin.site/introductory_econometrics_a_modern_approach_7th_edition_free_downloadbq6pg.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/3b0251d33fdd24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_602c3c6471664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5fecff465ce1e.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/8264367.pdfIn PDF document text
    • http://tur8osale.site/904109429179rxh6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5fe953a46adfc.pdfIn PDF document text
    • https://dewuvibemezifo.weebly.com/uploads/1/3/4/7/134763410/zumuzi.pdfIn PDF document text
    • https://kelesive.weebly.com/uploads/1/3/0/8/130874426/gabixikesusuro.pdfIn PDF document text
    • https://nefarixutasirov.weebly.com/uploads/1/3/1/6/131606035/wodotuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_602094eb10c4b.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/nivapoxemode-datafok.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/6f155b.pdfIn PDF document text
    • http://5coupon.info/bepegogulio0nf0.pdfIn PDF document text
    • http://reduslim-europa.site/chips_ahoy_cookies_nutrition_informationvw0uo.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/iYjdWgi/red_swordtail_fish_female.pdfIn PDF document text
    • http://reduslim-ufficiale.website/75219353343rk77g.pdfIn PDF document text
    • https://vexixizeled.weebly.com/uploads/1/3/1/3/131384380/xepazujan-gisowikasefi-vulofawix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 5176 bytes
SHA-256: b74b4932d39987309983487e99238b46a7db1709ca34c8b7f4621a46eb95d3e8
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 10592 bytes
SHA-256: dfb5464ba1b489420c93306505924d20f3e3a67f9ba46a41882bb1004d24e121
font_02_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3