Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64dcec507083227…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 08:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9b298aecba7ba001512807c5f2b61232 SHA-1: 3e029e7e77190d07d05c058e99d4b9a0e6f0b27a SHA-256: b64dcec507083227a368ab1636dbcc68f522cb0ae6e32093acc0f48ad6277b76
124 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. 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 0.8388

Heuristics 4

  • 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
  • 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://jottigo.ru/strik?utm_term=harry+potter+books+illustrated+pop+up PDF link annotation
    • http://siteznakomstv69.space/mufulerepiximigxpvbf.pdfIn PDF document text
    • http://makeyourself.xyz/bittorrent_filehippo_freekk7cf.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/search_instagram_account_by_email0gio1.pdfIn PDF document text
    • http://gatorama.site/mexixevopunisnkp3l.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/ij7Vzha/lepof.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/jeGjj0N/let_s_survive_survival_in_zombie_apocalypse_gameplay.pdfIn PDF document text
    • http://mexicotop3.xyz/ver_online_el_amor_en_tiempos_de_colera_pelicula_completa_en_castellanop2041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fc96d674c274.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/eEFA18k/nufizi.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/3Iljje6/sevezame.pdfIn PDF document text
    • http://creditscorecard.info/5382598489903q3j.pdfIn PDF document text
    • http://bathforlegs.xyz/slack_chambers_administrao_da_produouywds.pdfIn PDF document text
    • http://regse.website/subhash_kashyap_our_constitution_download8vmyb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://divepirat.epizy.com/scholastic_story_map.pdfIn PDF document text
    • http://vulaxojanomu.rf.gd/agya_koo_nimo_songs.pdfIn PDF document text
    • http://kakoxiji.rf.gd/81871448600.pdfIn PDF document text
    • http://pubilovojut.epizy.com/ultrasonic_ranging_module_hc_sr04_datasheet.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 5220 bytes
SHA-256: 4302bdf83e4e14390ddd7e8d82eaf6d3686a5b0f39de36cb21787a137338736a

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