Malicious PDF — malware analysis report

Static analysis result for SHA-256 645493aa70d1442d…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 13:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e336d2d071010ea67c4ea69d4879d9cf SHA-1: b9eaf3286ec64a39c8a8ba496b6246b54d408010 SHA-256: 645493aa70d1442d049a0e48598c2106558bf7ccf175be4056535364da3a829a
96 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 a high risk score. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used for phishing or to serve a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URI strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=which+are+weak+electrolytes
    • https://cdn.sqhk.co/rigizisojix/jbjcy2d/sevetusosatoradaburelor.pdf
    • https://cdn.sqhk.co/waxoxewanuvi/uYig0id/bubble_shooter_game_app_store.pdf
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fe62b6d6bab6.pdf
    • https://cdn-cms.f-static.net/uploads/4481836/normal_5fd900e68475c.pdf
    • https://static.s123-cdn-static.com/uploads/4384028/normal_5ffcdbbc15ef6.pdf
    • http://rijebipimaba.getenjoyment.net/the_annales_school_an_intellectual_history.pdf
    • https://cdn.sqhk.co/wodaximewule/Dgcgihb/black_beauty_grass_seed_ultra.pdf
    • http://daxavepevepa.mypressonline.com/shogun_2_christianity_benefits.pdf
    • http://nositadox.mypressonline.com/bible_study_outlines.pdf
    • http://suporefebakibur.mygamesonline.org/53598859492.pdf
    • https://cdn-cms.f-static.net/uploads/4454422/normal_5fe8f892f254a.pdf
    • http://vataponuxizeliz.mywebcommunity.org/brahui_language.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jafujasiwetid/kenneth_cole_watch_bands_brown.pdf
    • http://panexorumilogim.myartsonline.com/asme_section_viii_division_2_2020.pdf
    • https://s3.amazonaws.com/nuxomigo/73431451261.pdf
    • https://s3.amazonaws.com/gumegulaxi/83970713552.pdf
    • http://najukelosuned.myartsonline.com/98717036306.pdf
    • https://s3.amazonaws.com/sezewu/lara_croft_cosplay_guide.pdf
    • http://xepuzakudera.atwebpages.com/43386198093.pdf
    • https://s3.amazonaws.com/viromibukoleliw/wetok.pdf
    • https://s3.amazonaws.com/pezofut/zuvifa.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_off0000e48c.bin
09ba2c369db2a3e28245191b14d2ca0bbb7160a373998002d86fe14a888c3ec1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 5156 bytes
font_01_sfnt_off0000f62f.bin
c0d73b2b8567a36e38719f5ee394f09e19844e97f89889a57ab639ce8045f5ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10144 bytes