Malicious PDF — malware analysis report

Static analysis result for SHA-256 780cdc5af3f34b68…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 17:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1375d9c76aed562e756a214cb2edb7e6 SHA-1: c8922cb40590947aa3eecb2e0fa3b9acf89f8b95 SHA-256: 780cdc5af3f34b68ea023186cb204697004306b63e052b2a2b4c3954a53e5489
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://baarspo.ru/award?keyword=delta+carry+on+luggage+size+rules PDF link annotation
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/rotosibo.pdfIn PDF document text
    • http://liropade.22web.org/equivalent_fractions_worksheets_year_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454290/normal_5fdec95e9dc00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424328/normal_5ff36e4508b5e.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/what_plate_boundary_makes_seafloor_spreading.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/hvlihhi/best_vanilla_cupcake_recipes_easy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fde6afce5f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_601de793bdae8.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/fgcgfOh/wamudejuzodig.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/8711936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_601d79bbb0c06.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/fhjHidF/brain_games_logic.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/ajbhsBh/49413642856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujifadufat.rf.gd/86436715137.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/how_long_can_i_use_the_graco_snugride_35.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_off0000df3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3C 5120 bytes
SHA-256: 915efcb2825b3a1c0798246d582102e6b3e902cccddc6b58b787998038e125a3
font_01_sfnt_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 9976 bytes
SHA-256: 3478bbf68bc381aa9850ded6b00b7c7b41b05d29dfa4251206cccb88457f59bc