Malicious PDF — malware analysis report

Static analysis result for SHA-256 16445a740e6ab155…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 15:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3fd157e9f982621acb7fd961f4a7c462 SHA-1: 1e04b183d2265341efc39e36c897765486cbda7f SHA-256: 16445a740e6ab1557a2c9786a328097d9aeda883e5b482910aadc4fb6929e542
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=what+dental+does+medicaid+cover+for+adults PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5fd8c1c7371f3.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/nugabedovodazoxuw7a7bv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477886/normal_60028ece23e7a.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/FLsYsic/arm_demon_yandere_simulator.pdfIn PDF document text
    • http://bunnygummy.ru/3015932073335rxl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_600f26dc5d001.pdfIn PDF document text
    • http://test123test.xyz/instrument_of_the_bardloi64.pdfIn PDF document text
    • http://fishland.store/wekogubinujibilv3bx.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/negodedisoxop_pamepu_xopapelofi_fupugitawulaka.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/vabedafozo/xurogapitegefotoxikodamem.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/83482748945.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/fundamentals_of_engineering_economic_analysis_white.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/arnaud_desjardins.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/44140934168.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/39129501153.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_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 5336 bytes
SHA-256: 4d4a6b1aed2c2209601063bbced8f56dffa4fb7b150f19533e58792c7cab22a8
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 10428 bytes
SHA-256: 8c89df5d6dd9a5b85821e61bd89ebf2203f358496bd842e5f283481fb4a7cc66