Malicious PDF — malware analysis report

Static analysis result for SHA-256 f834ea2eac20f400…

MALICIOUS

PDF

91.2 KB Created: 2021-03-13 22:28:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bfd9c4e2a1f0a7f7b2e413b0a6cd7c78 SHA-1: 4c2e3f4461bb7311daf41ba993ef71c02a4acf92 SHA-256: f834ea2eac20f40064641720c3a9a50a1ecea220c65bc8de44f1e74424e8e25d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=candidiasis+oral+pdf+scielo PDF link annotation
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/2563a77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_6024bf679829e.pdfIn PDF document text
    • http://it50discount.pro/elementary_probability_theory8ogd1.pdfIn PDF document text
    • https://debinezituxi.weebly.com/uploads/1/3/4/3/134339783/wagifoxudanulo.pdfIn PDF document text
    • http://maslovauto.ru/miludojafuzatipuaxa8t.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/2191520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5ff1cc4208736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5ffcc18ea3e96.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/e688bb1784029cd.pdfIn PDF document text
    • http://argo-tourism.com/pathfinder_players_handbook_2vvi41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_2ebf2ecfdfbd4b1c9fc7b4ab85764ae0.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_f3d7a87f122745f6be805476eaca3c86.pdf?index=trueIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/nuraxure.pdfIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_859546a985914f2db554fb0cabf5fb1e.pdf?index=trueIn PDF document text
    • http://tuminexozuvino.atwebpages.com/jokox.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_b0a359ccf445470caa5a910e88930fa7.pdf?index=trueIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_f2306a5f38bf43ee8afd53fc351a9915.pdf?index=trueIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_0d5c0b578ff040ee97740f8e678ee725.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_e004996335154177bc64e148f5c76b41.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_d7500f60f47f4b169a3df39fa48772d8.pdf?index=trueIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_14e196f5dd5c43df9b7bf4e2ff2b71c7.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_a9cfa2d0cf0f45888f7aa1aba4d3efd6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 4880 bytes
SHA-256: f52be15f33f1c8e1aa3114d787eac20b39c715dc14727a43f1367a218031e87f
font_01_sfnt_off00012557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12557 13188 bytes
SHA-256: 1c3cfd34d812c53d046b236c97441f47193811151c44bfe99149eb47a16d837d
font_02_sfnt_off00014f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F59 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176