Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee724d05987cd2ad…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 22:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 920d2a8c22e233c112e1b3ad58cf93d7 SHA-1: c26d880968528b9c7ef1653a942bf37c9c422166 SHA-256: ee724d05987cd2adabc50c3119224b6bcf534efa6cbdb052d51bca8af0ebc166
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://soxebez.ru/123?utm_term=tft+item+build+sheet PDF link annotation
    • http://kelirajisob.66ghz.com/mitunufulodova.pdfIn PDF document text
    • http://logoped-samara.ru/energizer_battery_charger_specst1dwn.pdfIn PDF document text
    • http://livecopyrightverification.com/casino_magic_free_slots_machines816k0.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/gcicjfy/17433393382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459058/normal_5ff23aefc8479.pdfIn PDF document text
    • http://fashion-deals.xyz/fisojeroqkln2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_602466797a72a.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/zpu0hfn/zaguvunati.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/pTQbggK/xipasukafobedijalem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450876/normal_5fee8eced086b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5fec063535549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5ff966147698f.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/iegeNjP/aw_free_video_calls_and_chat_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/igE4jfn/wikesado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_6b545738f7304591bf77d1f97626f578.pdf?index=trueIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_f060fc16ba1040fbbc0eec04e617bf8f.pdf?index=trueIn PDF document text
    • http://zidaposiwogo.rf.gd/electronics_projects_circuit_diagram.pdfIn PDF document text
    • http://tegazadolital.rf.gd/2775637236.pdfIn PDF document text
    • http://tuvalej.epizy.com/zipunotazidebogefixu.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_4a2f77bc27224a88a0295af94b9908d2.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_8525243d4e964b79955e3f59584770a6.pdf?index=trueIn PDF document text
    • http://gogidovegesoxe.epizy.com/ubc_data_science_masters_reddit.pdfIn PDF document text
    • http://gubogur.rf.gd/bugotefulakipuwoz.pdfIn PDF document text
    • http://malinaliwul.epizy.com/70731614289.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/blank_space_song.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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 4928 bytes
SHA-256: 78994ee3a9b56c6d65035a6a673a6986aab80dfe8e3edbdefb5afc6b1c8dab66
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10636 bytes
SHA-256: ec3b67ac5825d32b328b910e2bb5ff71868ab8530da998310430395495bc256f

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