Malicious PDF — malware analysis report

Static analysis result for SHA-256 f367a71d574f3feb…

MALICIOUS

PDF

78.1 KB Created: 2021-05-17 16:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 368551f534b460911bea4431f5c2e2db SHA-1: 231e367727fe59fd65c90ae5ba3e299c348bfc24 SHA-256: f367a71d574f3feb66a3ad59806f2c346f44bf0410d1eabd3568a9116fdde618
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. The 'SE_CLICKFIX' heuristic indicates the document likely attempts to trick the user into executing a command, a common social engineering tactic. An external URI pointing to 'resalured.ru' was extracted, suggesting a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://resalured.ru/strik?utm_term=how+to+disassemble+logitech+thx+speakers
    • https://cdn.sqhk.co/kagurase/jd1egfD/85454576246.pdf
    • http://rumafelaneli.mygamesonline.org/38754117449.pdf
    • https://cdn.sqhk.co/zofizitene/hgxgjdb/hit_and_knock_down_hack_mod_apk.pdf
    • https://cdn.sqhk.co/rajexizeba/jPXjhji/starlink_launch_today_uk.pdf
    • http://moxipafuxoxo.mygamesonline.org/pazozosoruvem.pdf
    • http://jiwitoletazadag.iblogger.org/first_anglo_boer_war.pdf
    • http://guxetiz.22web.org/online_birth_chart_compatibility_reports.pdf
    • http://wowogobofomufu.mygamesonline.org/bemor.pdf
    • http://zivokuj.iblogger.org/best_running_programme_for_weight_loss.pdf
    • http://vopibuxipem.22web.org/doxutovelugim.pdf
    • https://cdn.sqhk.co/luwiwaduna/bjdUogf/balavopaxudepewipew.pdf
    • https://cdn.sqhk.co/naketego/ZMxhhg6/city_sports_shoes_for_sale_in_pune.pdf
    • https://cdn.sqhk.co/guzupewad/hgehdih/52450909448.pdf
    • https://cdn.sqhk.co/bedepekemat/KmxQogd/zutevelilegonuziranibovof.pdf
    • http://fortuneo.biz/space_shuttle_images_hd7mbo0.pdf
    • http://sportplays.ru/mortal_battle_fighting_gamesku153.pdf
    • http://wildboost.club/heartache_tonight_piano_sheet_musicauswb.pdf
    • http://6gusevshop.space/design_sponge_travel_guide_bostonhefu7.pdf
    • http://selectgetc.top/crosman_1077_spare_magazinellv1h.pdf
    • http://pililiriniru.mypressonline.com/10514950929.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puderumito.rf.gd/james_and_the_giant_peach_book_review.pdf
    • http://xanivuva.epizy.com/fapobozulonulebuj.pdf
    • http://gavawekib.myartsonline.com/bowditch_download.pdf
    • http://wuparol.epizy.com/lekepuwisodopetazupesalaw.pdf
    • http://zoxukawozo.rf.gd/xerox_altalink_c8035_manual.pdf
    • http://giwuvupajot.epizy.com/apache_kafka_tutorialspoint.pdf
    • http://tolitaxolumupu.rf.gd/mathematics_basic_formula_for_competitive_exam.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_off0000f0a3.bin
2bad6a4d2e51572dd508fff7838e8283f00355960600ce259e8faa17fad44d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 5812 bytes
font_01_sfnt_off00010452.bin
a6000fd84076fb46643cc37ff75ff3aca8d61a228ce437c7c90ec6b29e0d8418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11192 bytes

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