Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5283053d4590cee…

MALICIOUS

PDF

79.7 KB Created: 2021-03-15 19:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3dc9bea4cc9c6f5ad8a4e3d9a0a1507 SHA-1: d6d91e995b9568a6312fa0caec8dd74c010eb37c SHA-256: c5283053d4590cee10f7ac4502d076dd6b58b79d798fc83ad50364a5a4674053
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'functional isomerism'. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/award?keyword=functional+isomerism+pdf
    • http://temivenoni.iblogger.org/android_tv_box_remote_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4493916/normal_6027baa3bdf8b.pdf
    • https://nogorixarolixi.weebly.com/uploads/1/3/0/7/130740589/papogujej.pdf
    • https://cdn-cms.f-static.net/uploads/4366630/normal_60341c269749d.pdf
    • http://sakulog.sportsontheweb.net/wuver.pdf
    • https://kamenibez.weebly.com/uploads/1/3/4/7/134727972/madigakuzela.pdf
    • https://ratesikumetu.weebly.com/uploads/1/3/1/1/131163578/jukosipofitalis.pdf
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/noxel.pdf
    • http://gevifavilovaz.22web.org/can_you_play_blackjack_online_with_friends.pdf
    • http://jojidasusesot.sportsontheweb.net/does_the_watchmen_movie_follow_the_comics.pdf
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/9435278.pdf
    • http://vojemodipu.sportsontheweb.net/lalobudarejefiporeleparek.pdf
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fe87b842d518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeroguru/adobe_captivate_7_crack_free.pdf
    • http://mavipob.epizy.com/free_java_version_1._7.pdf
    • http://godavuvexo.epizy.com/direct_and_indirect_speech_activity_sheets.pdf
    • https://s3.amazonaws.com/bokelur/caselet_di_questions.pdf
    • https://s3.amazonaws.com/kufazete/16211838067.pdf
    • http://juludix.epizy.com/guided_by_voices_suitcase_discogs.pdf
    • http://saninov.epizy.com/50464476909.pdf
    • http://nilevividik.rf.gd/kegasogumat.pdf
    • http://xopunuz.epizy.com/alendronate_sodium_davis.pdf
    • http://jefesipi.rf.gd/latogemekokarixanu.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_off0000f9d5.bin
4f8969a63235216e3fea242a7b60716eb1ebf5c708a1533aa7b9771c343c52de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 5256 bytes
font_01_sfnt_off00010ba2.bin
d72db93f5f3e596af28f9f45a2d27678572fe592023415f0670fc1e42941681a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 11100 bytes