Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6194d205a14fa92…

MALICIOUS

PDF

70.0 KB Created: 2021-05-30 20:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f5fd16e1b3bec95f65d87828c4e97915 SHA-1: 787a3057dca198f749cc0c53f95fa15d58a796c6 SHA-256: c6194d205a14fa9245c31f9b95eb5cdc7c401317781daec5d8b810260b2af90f
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary malicious URL identified is 'https://yafferge.ru/strik?utm_term=2001+honda+fourtrax+350+parts+canada', which is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=2001+honda+fourtrax+350+parts+canada In PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/8d9d7.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/3254164.pdfIn PDF document text
    • https://lusulabudigesa.weebly.com/uploads/1/3/2/6/132681481/zanozowujamatifala.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/81464867aab55.pdfIn PDF document text
    • https://vefiwuzozubeki.weebly.com/uploads/1/3/0/9/130969791/a9e6e81b2adfcf9.pdfIn PDF document text
    • https://dabelebixoxo.weebly.com/uploads/1/3/5/3/135310161/tekivakomijewa_zerelezi_bajaludojenun_falisadakafuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_6041215ec2617.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/bisewu_zimud_surevikegerip.pdfIn PDF document text
    • https://denosofebulapan.weebly.com/uploads/1/3/5/3/135347567/popeliwifefome.pdfIn PDF document text
    • https://gewefasawetuje.weebly.com/uploads/1/3/5/3/135315234/begiziganup_jagubefenozopar_vubed_jivigote.pdfIn PDF document text
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/5721057.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/8042372.pdfIn PDF document text
    • https://rariborujur.weebly.com/uploads/1/3/4/4/134443596/danadineve.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/7a8e53847fba61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_6056c7dd1e761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_6054b2412e391.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/dixal.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/c45a3f.pdfIn PDF document text
    • https://kilesikawagex.weebly.com/uploads/1/3/4/3/134372597/xarisawewog_jinajaxemapaxiz_wufofulejita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_5fd7cfecd56d4.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/e1e46f2a40523.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/8654468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/251528cc-d90f-4a51-b26b-a191c9a9ef98/gemasuxifisel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ce1679-7eda-463c-ae0c-2a0a062efaee/wetam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dc60ae-2c1a-44ce-b3cb-4ff6f368aad9/the_woman_in_cabin_10_audiobook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbe0cfe-8c34-49bb-8141-97af32d9fdbe/30871581107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1df4a52-be98-454e-b374-c958cef3b114/pujaxusozuzuwarigu.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_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 5796 bytes
SHA-256: 4e018afcb5c5113c87669c37b5d7206bf48ffffed3d5e1ff2c8b487eb960bff7
font_01_sfnt_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 10128 bytes
SHA-256: fca992e02fc743b97729405c4421e7873efbd3486a79828bfa0332689ea1a289

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