Malicious PDF — malware analysis report

Static analysis result for SHA-256 608ea7b09424e19f…

MALICIOUS

PDF

79.7 KB Created: 2021-05-17 03:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7f223ed423e5d1326246e4192e5aaebc SHA-1: 7180d24d544836c19a2bc24556b100c316bbbdb3 SHA-256: 608ea7b09424e19f96b022e5f55b896d8e16162435f39e13e222dc13eed01bad
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/strik?utm_term=canon+pixma+mx+890 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451033/normal_603bab35a911e.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/pudogek.pdfIn PDF document text
    • http://astropsychology.site/35367111848cvf7w.pdfIn PDF document text
    • http://bupro.asia/kindle_user_guide_for_ipadatqx2.pdfIn PDF document text
    • http://manovina.mypressonline.com/fanan.pdfIn PDF document text
    • http://copyrightsupporteds.com/avengers_endgame_full_scriptxg9sk.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/588e07eef3aa3b.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/bisacodilo_en_el_embarazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fda7b8b814cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_605613e5a7db1.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/nowad.pdfIn PDF document text
    • https://jovawovifo.weebly.com/uploads/1/3/4/8/134883275/moreb.pdfIn PDF document text
    • http://naturfresh.space/libros_de_introduccion_al_estudio_del_derechogr4gi.pdfIn PDF document text
    • http://naturapple.space/longman_dictionary_of_contemporary_english_6th_editionafm1g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_606540b5a246d.pdfIn PDF document text
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/vekisasimuf-tifefegok-kivimivelo.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/2827100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418788/normal_6005da1a56e1a.pdfIn PDF document text
    • http://bestunew.xyz/umrah_pocket_guidewwfv0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5fee985da33e8.pdfIn PDF document text
    • http://persequen.com/how_to_learn_easy_englishds61e.pdfIn PDF document text
    • http://feedbacrnz.space/66623691348mwcpt.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/40632715244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugagib.atwebpages.com/moselusisumafizufan.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_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 5124 bytes
SHA-256: 4c49880c6b272afdeb5f385311ebac5919fc403e9232fe3305ce8c517e72a074
font_01_sfnt_off00010b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 11348 bytes
SHA-256: 09bdc2699feb861948edad68e5924254a128054181cc123f11f34ce1bf6efb65

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