Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7145ed293abf10b…

MALICIOUS

PDF

110.0 KB Created: 2021-02-16 03:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 42b77ae5157a6f8bbda8ef88d2e540a9 SHA-1: 97a5459539cfa4582b98de4e14b2d9c287c8cf9e SHA-256: d7145ed293abf10b57f3451fca700f0c6a691d122f43d896cbeef2e9123d40c6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs disguised as search results for free software downloads, aiming to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wb?keyword=sketchup%208%203d%20models%20free%20download PDF link annotation
    • http://milanbeach.fun/cheap_thrills_sia_remix_songpy7ih.pdfIn PDF document text
    • http://guwodela.iblogger.org/57472023061.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/pexirip_nitobifasag_gevofudid_suxugividix.pdfIn PDF document text
    • http://ductsunlimitedins.com/40573004529x4gcr.pdfIn PDF document text
    • http://tuwuviji.iblogger.org/8023962403.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/filiruwekedarevof.pdfIn PDF document text
    • http://bumaga.bz/antivirusni_programi_za_android_freewvx0l.pdfIn PDF document text
    • http://extraterrestrials.space/building_information_modelling_bim_adalah4yglw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5fe2143284b86.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/barber_shop_san_antonio_ibizawtwiv.pdfIn PDF document text
    • https://kixakusafi.weebly.com/uploads/1/3/4/8/134891224/giruxojuli.pdfIn PDF document text
    • http://rte-ita.fun/english_reading_comprehension_for_grade_17tx3l.pdfIn PDF document text
    • http://wekeb.space/46682853739h59xh.pdfIn PDF document text
    • http://freds.space/talikovukcdqx4.pdfIn PDF document text
    • http://keviwipixemew.22web.org/belidixosub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fdef1cb7ac6f.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
    • http://rogofijanititad.epizy.com/manual_instrucciones_tissot_prc_200.pdfIn PDF document text
    • http://zonefodewev.rf.gd/sawerebopazosumogujajel.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000162dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x162DD 31800 bytes
SHA-256: 7f8ef081617998323cc5ba6919e8636a92c5d6ba583f2253331b4c3a7c7c0dff
font_00_sfnt_off00012dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 5848 bytes
SHA-256: 9788fa73a14661cb8e6ab29cafe8f4c2b61e1d755bbe1527994be145ef49726e
font_01_sfnt_off00014194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14194 9680 bytes
SHA-256: a9da061b1f90fc7ab287fddd273873e3b3b6bbd879892231275155f462b4b7ca
font_03_sfnt_off000199f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199F3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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