Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c735d60b4484f0a…

MALICIOUS

PDF

72.5 KB Created: 2021-02-22 23:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 68688e2fc8cdc37a0fd1ff75d043c262 SHA-1: d949cecb6203b37a23148c7e41b4da591d107260 SHA-256: 0c735d60b4484f0a3e769ff9a66383c3b263a9ed49c20510350d6cf777e18532
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=taming+of+the+shrew+study+questions+and+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6019b962ebcde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_600ea2e61069f.pdfIn PDF document text
    • https://pameduvexeligim.weebly.com/uploads/1/3/4/5/134579292/7085130.pdfIn PDF document text
    • https://cdn.sqhk.co/rajosibakulu/vdyW3gh/du_application_form_fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5fd5f70e155d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_602ac596a99fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_602f925a5022b.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/XjegfkU/tetris_99_dlc_eshop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427501/normal_5ff47af2c4092.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/luvexonobefabazogom.pdfIn PDF document text
    • http://gitipakivo.iblogger.org/84757382120.pdfIn PDF document text
    • https://risovokoxenixe.weebly.com/uploads/1/3/3/9/133997247/f035def12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_601eae5a32645.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/canon_rock_backing_track.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/94012257675.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/love_couple_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/jumarezumiwifesepif.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_off0000dead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAD 5556 bytes
SHA-256: a7abe22128c4eee233401af954e58967322c45e7acbd0c1501d5a2a43fe6f0cc
font_01_sfnt_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 10408 bytes
SHA-256: aa0d4572e3d081618c72f2c8d4be65639c45d444f98fc5d03a4f0fe373aeb364

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