Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c40389fcf987d5f…

MALICIOUS

PDF

81.5 KB Created: 2021-04-19 01:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 521d54939bb8aada3713710f2817ccb1 SHA-1: a415169e53acaaa7fe4dfd189c6fbbaaba834cac SHA-256: 2c40389fcf987d5f70a504424bdc6699fad43afeb16f3a7f0920fd847690001a
136 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic where the document itself provides instructions or a password for a separate archive, aiming to bypass gateway security. The embedded URL points to a suspicious domain, likely serving as a distribution point for further malicious content.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xezojetit.ru/strik?utm_term=funci%25C3%25B3n+del+sistema+endocrino+en+el+cuerpo+humano
    • https://cdn.sqhk.co/goxejake/heihahh/kututisefagew.pdf
    • https://cdn.sqhk.co/molofagaji/jhcuykf/manufacturing_costing_methods.pdf
    • https://cdn.sqhk.co/tukawezezo/tgfhyYd/archery_king_unlimited_game_download.pdf
    • https://cdn.sqhk.co/kipasewimoni/cjju0ic/merimifufexodifoxofubu.pdf
    • http://sinoxaju.mygamesonline.org/lesupopune.pdf
    • http://vedatolinofiz.iblogger.org/92313041019.pdf
    • http://fipagolanikobax.mygamesonline.org/lisutatopodaturivup.pdf
    • https://cdn.sqhk.co/gixenako/t1czhfh/nasasemomepinelebanu.pdf
    • https://cdn.sqhk.co/xosaletozobi/Ahjbihx/tugizosugujekedo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://senotujupube.epizy.com/nizufid.pdf
    • https://s3.amazonaws.com/lanaladu/kesaxezizewumipavitu.pdf
    • https://s3.amazonaws.com/zuses/android_app_store_whatsapp.pdf
    • http://lofufizopugopo.rf.gd/revabuseramaja.pdf
    • http://vezifapix.epizy.com/how_to_become_community_organizer.pdf
    • https://s3.amazonaws.com/midizaxopazeji/best_portable_air_con_in_australia.pdf
    • http://babotos.epizy.com/classical_beam_theory.pdf
    • http://fomabobas.epizy.com/does_dunkin_donuts_have_peppermint_mocha.pdf
    • http://megigezorozo.atwebpages.com/free_wordpress_website_builder_software.pdf
    • http://vofopinalog.epizy.com/telikekabogowiligoxituli.pdf
    • http://toxukofotu.rf.gd/siveloxoseloma.pdf
    • http://luzoputaran.rf.gd/bonney_forge_catalogue.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_off0000ffeb.bin
80c2a0f3d340c91978b3a07ec354310040bf11ff28f5b1729888d113e8a068b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 5404 bytes
font_01_sfnt_off000111de.bin
3e960c53e0821b94273df904d93ec89a4a78ce14369a18845a760c7fa65a1d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DE 10924 bytes

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