Malicious PDF — malware analysis report

Static analysis result for SHA-256 8097cb09613879ed…

MALICIOUS

PDF

84.5 KB Created: 2021-03-14 10:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61635827b7e7669b42c0d2f1eaee1549 SHA-1: 10e3334fc9ecf907163d151f8ff04edc5e47af03 SHA-256: 8097cb09613879edd80ac5d56946b4315855c0ebab3b7da0d78cbe57583101ab
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of the attack chain. The document body, though heavily obfuscated, suggests a lure related to a book summary, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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://jacksth.ru/strik?utm_term=thomas+jefferson+the+art+of+power+summary
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/640c71a35f96.pdf
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/1070854.pdf
    • http://mmmmmme.space/instant_checkmate_report_costtjwwe.pdf
    • http://pufexob.iblogger.org/71497358089.pdf
    • http://mamontov-net.cc/novipoxakivivorakulolet226ey.pdf
    • https://xurepisex.weebly.com/uploads/1/3/4/7/134718841/9284176.pdf
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5ffc1ddfc1b65.pdf
    • http://worabipupe.mypressonline.com/xuzur.pdf
    • http://siwupezomejen.getenjoyment.net/do_i_have_to_pay_rent_without_a_lease.pdf
    • http://fisuruwibowin.66ghz.com/71839251098.pdf
    • https://cdn-cms.f-static.net/uploads/4452152/normal_601cdf3a27a30.pdf
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fdf527020e6a.pdf
    • http://kejurudoji.medianewsonline.com/can_iv_contrast_be_given_through_central_line.pdf
    • http://pristav.pro/60707375130gocp2.pdf
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/xesixelami_mukijaxakanul_tifilevugaj.pdf
    • http://am-sound.ru/xapomunepekeser294n.pdf
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/7c8d6d799.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kixexagejo.epizy.com/ice_cream_instrumental.pdf
    • http://walexesanub.rf.gd/kaz_v745a_humidifier_cleaning_instructions.pdf
    • http://kamolujuk.rf.gd/big_easy_oil_less_turkey_fryer_cooking_times.pdf
    • http://rawozovikoruros.rf.gd/32657206065.pdf
    • http://sezajebufixi.epizy.com/robedaguratixigutivurat.pdf
    • http://sazasewugekupej.onlinewebshop.net/lixupuvufutemupiki.pdf
    • http://bixozebaxikapos.atwebpages.com/80772594505.pdf
    • http://wikilupari.epizy.com/jotadawo.pdf
    • http://momogopi.rf.gd/pejanejinuri.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d5b.bin
c52706fe0a1e311da0fe137367a0c956fb2cea65a11742a9b31638a05447e682
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 5328 bytes
font_01_sfnt_off00011f67.bin
097c8dfa49fb5d8b84993e00a7505513e65bd082ddfa9a984eb611790136bf66
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F67 10764 bytes