Malicious PDF — malware analysis report

Static analysis result for SHA-256 799c86847ffc7796…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 13:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ddb1ded137e56b9bde8956a6d7d351e3 SHA-1: 4aa82c9d8c04c678785af08f78767f91c68d2607 SHA-256: 799c86847ffc7796b48b7fc142c7cd6c8aaa6d3c475c1344254a1d71e682bcdf
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://pelibifir.ru/award?keyword=realtek+high+definition+audio+driver+update+windows+7 PDF link annotation
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/e6f79266cb5788.pdfIn PDF document text
    • http://proflist-briansk.ru/jojevunjnd66.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/ieAr5W6/50845051314.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/t4jbjc7/internet_speed_test_speed_test.pdfIn PDF document text
    • https://kaxapajitab.weebly.com/uploads/1/3/4/8/134896246/247ceda.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/7104b9dc72a4a.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/b191f42.pdfIn PDF document text
    • https://zuvigopujipo.weebly.com/uploads/1/3/0/9/130969218/konunugaga_vumipemotukujod.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/saxakijiwiwo_vasifaleperu_sabog.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/dolokapuranadisibonoxobaf.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/giduxajuf-fiburaxemujeba.pdfIn PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/dotin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_60082050509b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_6000a633463f7.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/agile_project_management_training_near_me.pdfIn PDF document text
    • http://mebelintera.ru/5530623782onwkq.pdfIn PDF document text
    • http://cafe-cok.ru/el_profeta_khalil_gibran_resumen_por_capitulosrcwcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 5604 bytes
SHA-256: f776452ce40d46bbb091815b8aea0827a4173b956278bd07e5b8e43ae1079697
font_01_sfnt_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 10000 bytes
SHA-256: 0843527e389f332e7bf93fef6814697a06106f073b724b197fd7af056e9df534

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