Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b13f6a08f9be163…

MALICIOUS

PDF

72.5 KB Created: 2021-02-17 12:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ac13de955df49822c9ada7277ddd6dc8 SHA-1: 5042e95ffd0572cf16f0a42414c6d7e5fc566142 SHA-256: 0b13f6a08f9be1630812824f18af4019a98b11a80b6368f502ce92dcfdde545b
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a popular artist's tour schedule, a common lure for phishing or malware distribution. Heuristics indicate the PDF is a link farm hosted on disposable infrastructure, and ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=carrie+underwood+tour+2020+schedule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5ffaa64070fbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5fed66cc57b07.pdfIn PDF document text
    • http://vafakewa.iblogger.org/nizujoxukirixowawumatoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ff9ec81cc29f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_602548a3926c8.pdfIn PDF document text
    • https://porukugo.weebly.com/uploads/1/3/1/3/131380087/netowutezomumi.pdfIn PDF document text
    • http://bezigex.iblogger.org/boy_and_girl_sad_pic.pdfIn PDF document text
    • http://tofuvuniz.iblogger.org/backus_naur_formalism.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/681a07e5f85a.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/cardboard_texture_free.pdfIn PDF document text
    • https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/8451163.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivigowukom.epizy.com/joguvazikesujemilodoxa.pdfIn PDF document text
    • http://tizepadeda.rf.gd/facolt_di_scienze_della_formazione_bergamo.pdfIn PDF document text
    • http://lajixowamimexo.epizy.com/99911677264.pdfIn PDF document text
    • http://vozoxutizetu.epizy.com/nixozonamekirubonamake.pdfIn PDF document text
    • http://supovopekowo.epizy.com/cdigo_brasileiro_de_aeronutica_comentado.pdfIn PDF document text
    • http://vadarawofi.epizy.com/how_does_a_kaba_lock_work.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_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 5296 bytes
SHA-256: 702be3f958eb50e5b287e2c4382a59b17a629913a1e3b60a973040f2d0f11fe8
font_01_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 10724 bytes
SHA-256: 0da8621ea941b973effdfb507c916837b6c417ba4c356fb8ca7929e27d2d7e1d

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