Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36528e516699257…

MALICIOUS

PDF

67.0 KB Created: 2021-05-16 10:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77d58a091c0487014cdf18bd62971a87 SHA-1: 0e81dbbebe461c0f66b4c938e13c3400f37b0c2b SHA-256: b36528e5166992578bf13a377d94f838470cceeea22e07bf36b081a526f7e8e0
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 0.8275

Heuristics 4

  • 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.
  • 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://maypoin.ru/strik?utm_term=fisher+price+swing+strap+instructions PDF link annotation
    • http://xuvaguwanolinu.66ghz.com/capital_expenditure_policy_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_6035685b2b3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_602605db86d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5ff2b322c2091.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/61961979470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5fe7aded573d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fce78641a6c2.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/baermann_clarinet_book.pdfIn PDF document text
    • http://rixivuk.iblogger.org/g50-45_laptop_lenovo_-_type_80e3_specs.pdfIn PDF document text
    • http://nutigunejome.22web.org/best_tile_floor_cleaner_machine_consumer_reports.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/sheet_metal_gauge_to_millimeters.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/el_alfabeto_en_ingles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nademopor/abcd_movie_video_songs_free_1080p.pdfIn PDF document text
    • http://misupegadux.epizy.com/algebra_symbols_and_meanings.pdfIn PDF document text
    • http://xegunapajom.epizy.com/wusovaxunifufubib.pdfIn PDF document text
    • http://xonafalapon.epizy.com/karaoke_cinta_luar_biasa_mp4.pdfIn PDF document text
    • http://xowofalofuzuxis.epizy.com/xirenufajuvalivoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/49434822769.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/ge_true_temp_oven_number.pdfIn PDF document text
    • http://pixudavevenute.rf.gd/sustainability_reporting_philippines_sec.pdfIn 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_off0000d8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F3 5212 bytes
SHA-256: f5b9caee714496696e619596c8db294d996a41713af947dda4b294f1394abe62
font_01_sfnt_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 10516 bytes
SHA-256: 594afc14dffa672efa5b6408733c355129377ae9d5e2568b49cbd98ef637ee23

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