Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce6ee1585e66068…

MALICIOUS

PDF

79.4 KB Created: 2021-03-11 04:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77a142d5b9bd9821791c58e9c0dc75df SHA-1: d4af0ff5ec4f0b8076d027e748104661a8c4c880 SHA-256: dce6ee1585e66068dac415c3242d141da873039ebb4db93e79ba1b078af67129
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crophysi.ru/strik?utm_term=stihl+ts400+specs PDF link annotation
    • https://cdn.sqhk.co/vobevufubito/fiifhj3/classic_cars_for_sale_by_owner_springfield_missouri.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/id2hdhi/9472491850.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/hD1ienc/30559844165.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/fupixulobuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5fdc6f68ccf29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6011a575d2a30.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulobu/igLjehi/skyrock_radio_numero_toulouse.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/ficgdie/used_coin_pusher_game_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/iHOFib1/40999835528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_600ed62e1544b.pdfIn PDF document text
    • http://tronreserve.online/51690867460ipijj.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/igcbic3/pejanibulamegaxit.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/7ibowm8/burraco_e_pinelle_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/ihr81ii/hoedown_aaron_copland_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_603e8b936d69d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477623/normal_5ff64a82d851a.pdfIn PDF document text
    • http://healsmall.space/98403788031633t8.pdfIn PDF document text
    • http://milanomoda-italy.site/xitevixaxivituwikuralj9d9b.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/ZjbIGgc/89949651415.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/tissot_t_touch_expert_manual_download.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/speak_up_magazine_download.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/22628766416.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/electrical_and_magnetic_properties_of_nanomaterials.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_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 5048 bytes
SHA-256: f041aeb71aac3f9e1486b7a611f927f717ea6fcf42866208905924189fc93556
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 10672 bytes
SHA-256: 1d51de2f578839aa06f52bdf39192fa1a555fcb2070bd6ba1efd78fa5b4ae33d

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