Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb18f3a9dd92c10…

MALICIOUS

PDF

76.3 KB Created: 2021-02-17 09:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6cb75bc1cc644d43a203ab92f234028 SHA-1: 25c269448c6d5ab82573a035b3a09bc5599f270c SHA-256: fbb18f3a9dd92c10a7fb1d7ffe952bb66fab29efdea76c9bc405c573f7e5ade5
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and an urgency lure. The embedded URL, https://jacksth.ru/wix?keyword=mhw+rainbow+pigment+checklist, is likely part of a phishing attempt to trick the user into downloading a payload. The document body, though truncated, suggests a lure related to a 'checklist'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=mhw+rainbow+pigment+checklist
    • https://cdn.sqhk.co/fexejikexew/gcWFUhg/ps4_now_games.pdf
    • http://fafasun.iblogger.org/quickbooks_premier_link.pdf
    • http://sojekobab.22web.org/ahtisa_manalo_miss_international_full_performance.pdf
    • http://vexidizagopukib.22web.org/alif_ost_mp4.pdf
    • https://cdn.sqhk.co/gabisolovima/503gigf/battleground_survival_mod_apk_unlimited_money.pdf
    • http://arendaavto.taxi/world_championship_2019_cycling_start_listz6l3u.pdf
    • http://on24-system.club/rerusowomarefunodetln0d2.pdf
    • http://tovelksa.website/lederoduwad9a2x4.pdf
    • https://cdn.sqhk.co/potiribuwuf/ihdihxo/fobawusokureb.pdf
    • https://cdn.sqhk.co/sepagumal/ggsqgi4/word_connect_level_992_answers.pdf
    • http://devgm.design/media_partnership_proposal_templater46nq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nutimuratibuzur.epizy.com/85179917818.pdf
    • http://goseletew.epizy.com/zuwinuzukenoselisodogutip.pdf
    • https://s3.amazonaws.com/vasofirida/papilawukagosose.pdf
    • https://s3.amazonaws.com/pukiza/dojowujuk.pdf
    • https://s3.amazonaws.com/ninasivol/gauge_thickness_chart.pdf
    • http://vekifaxofezawe.epizy.com/90996061881.pdf
    • https://s3.amazonaws.com/tamobalasu/jenos_guide_paladins.pdf
    • http://kuxomexepus.epizy.com/children_s_halloween_mask_templates.pdf
    • https://s3.amazonaws.com/bepukuba/talaj.pdf
    • http://rodudupisebi.rf.gd/bleacher_report_packers_aaron_rodgers.pdf
    • http://zatojigetafugud.epizy.com/down_in_new_orleans_clarinet_sheet_music.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_off0000edba.bin
ece885c483629574506a3a0ede986a88beb8bb31865b150eb416bdd15e1b5c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 5648 bytes
font_01_sfnt_off000100e2.bin
6620a6013ed3c8cfb4b683f031b1af400f47e606b77540192e49bd3d4923af19
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 10380 bytes