Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97fa412bdcf95a4…

MALICIOUS

PDF

85.6 KB Created: 2021-03-18 06:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a5be316374f3ea05da63577215efcd16 SHA-1: 265e5ee95a4f7e6e0c55e070aa5d48de377e50aa SHA-256: d97fa412bdcf95a4dc78e1f654ccc2827c9e6b10f4683f5ec0386b1bed290de8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to suspicious domains, specifically 'kuzutuzo.ru' and 'sneakerspapa.store', which are likely used to host phishing content or download further malware. The document body, though heavily obfuscated, suggests a lure related to typing Greek letters on Windows 10, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=how+to+type+greek+letters+on+windows+10 PDF link annotation
    • http://sneakerspapa.store/61995369363y5sbm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5fee660b9d64c.pdfIn PDF document text
    • http://gujufifirisin.22web.org/new_jersey_unclaimed_property_reporting_requirements.pdfIn PDF document text
    • http://sethel.xyz/senior_graphic_designer_salary_202059tc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_600eca8f745d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_603053db9c1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_6018dec897d9c.pdfIn PDF document text
    • http://1pokypki.website/fallout_76_herpetologist_exam_answersty0yo.pdfIn PDF document text
    • http://mebelintera.ru/ziglar_self_talk_cardsa9uyd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_602acf5e8405e.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/figugipopar/34511070710.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_99123680fd604332940c263314106987.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_0668feb889d54e37985039f4f1ea183c.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_883f6d84307c4081894b0bc5ce83bc24.pdf?index=trueIn PDF document text
    • http://votuvut.epizy.com/pathology_of_hiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/aws_sysops_certification_dumps.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_62c96eff08d743b085d39edb7c578bbd.pdf?index=trueIn PDF document text
    • http://jokajovasoxaruf.epizy.com/old_school_classic_songs_70s.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_217616b936814098aa94b77cf945a8c1.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_c8031e2b095643f08f46d4006ee08120.pdf?index=trueIn PDF document text
    • http://vidodelogedotub.epizy.com/rosezobavasafesub.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_fc6ae4589a2e44af8488f6fdd277b9ec.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_ea193d2a66d74ab48364e772f95273f0.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5328 bytes
SHA-256: 5bd2d43afa2a76ccb5e784451003b807af0fadfac0969eda8cb00d3903b975e3
font_01_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 15436 bytes
SHA-256: 4e057599230889e037b0a7550fe11001a462a66ebb31cd2660679f58147e48f2
font_02_sfnt_off000133cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 16136 bytes
SHA-256: 0107fd2533b4428042f75bab54f69e52190328925d3599566e3fef1077143ca2