Malicious PDF — malware analysis report

Static analysis result for SHA-256 b646dcf761e116ce…

MALICIOUS

PDF

47.6 KB Created: 2021-03-28 10:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 555e0a7ef68a2cbe8532a63fe6f24062 SHA-1: 3845c28635fe7148155125eec1271ec399c74ace SHA-256: b646dcf761e116ceae5f5f59118fa26cb1e13b0f10a017151f879e03ad39b219
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to conceal a clickable link. The document body is heavily obfuscated, but the presence of numerous external URIs hosted on disposable domains suggests an attempt to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7238

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 47 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dugedepap.ru/award?keyword=handbook+of+fisheries+and+aquaculture+icar+pdf+download
    • https://cdn-cms.f-static.net/uploads/4477892/normal_603d5a5582468.pdf
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/wuxuwezava.pdf
    • http://xozowilozoga.mywebcommunity.org/tabletop_rpg_for_kids.pdf
    • http://vuzatiriranune.22web.org/97383535407.pdf
    • http://zhk-rekord.info/breckwell_pellet_stove_problemsvnxpl.pdf
    • http://getcabinets.xyz/pioneer_fh-x720bt_installation_manual2qgb2.pdf
    • https://static.s123-cdn-static.com/uploads/4420230/normal_5fe3be7dc5107.pdf
    • http://teplotronic.ru/zapevudaverakaxufumeinbgv.pdf
    • http://manekobe.22web.org/samsung_a10e_specs_canada.pdf
    • http://philonio.online/vocabulary_from_latin_and_greek_roots_level_xii_unit_10ugd3s.pdf
    • http://workbykoder.xyz/86859437360gwks0.pdf
    • https://nafuvazufu.weebly.com/uploads/1/3/1/4/131407552/fusotavodax_pobowafazugojag.pdf
    • http://gomesuzos.mypressonline.com/branding_vs_marketing.pdf
    • https://cdn-cms.f-static.net/uploads/4367304/normal_60285c09be50f.pdf
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/3226a.pdf
    • http://irisca.online/does_costco_sell_big_green_eggfpd61.pdf
    • http://pajuxiral.rf.gd/albert_camus_francais.pdf
    • http://liroporuki.myartsonline.com/how_do_i_change_the_battery_on_a_dyson_dc59.pdf
    • http://melaworogafema.epizy.com/makuze.pdf
    • http://xomapagovujux.atwebpages.com/practical_english_phonetics.pdf

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