Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a262c048cb1863…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 19:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dd6c7ac93348ebea4aa0c10b7d632458 SHA-1: 7e2612edca65d1cc0d0f2d68c801766bdbbd6e59 SHA-256: c4a262c048cb1863fb9f0182646bbeae2b54f12a2068855bb7bb904ba1aaab33
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://mezovuduw.ru/award?keyword=what%2527s+bad+for+high+blood+pressure PDF link annotation
    • https://cdn.sqhk.co/kufomopinu/jdEgeXT/zogidevegezusanexututowod.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/wigarililuvege-mezine.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/akjdjc3/lionheart_tactics_forum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_6026310cbcce9.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/OGgdjje/chicken_invaders_5_cheats_download.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/how_to_start_an_observation_paper.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/gabevawazuratagemeridewu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448094/normal_5fc66f422ff8a.pdfIn PDF document text
    • https://vuvunovugigadi.weebly.com/uploads/1/3/0/8/130814714/66615ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_6006b5ae8b753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5fe725bb1d782.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/1gchfhc/xumafaverimubexu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447085/normal_5ff9c64b99f4e.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/2c16f28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5fcbc3391215c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magegefopo.atwebpages.com/what_kind_of_text_structure_is_a_recipe.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_off0000ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 5488 bytes
SHA-256: e65d5e0a580e13f9af58f555205bc391d7badba1d80c17b49a1d005af409a9f2
font_01_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 9528 bytes
SHA-256: 09d0e6adba486e04715fc0714a2312039e083f28e05dbaaca4b6fd8038a08b9c

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