Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d7b0ca15a17cfc…

MALICIOUS

PDF

76.3 KB Created: 2021-04-22 10:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c749515f6dc08101ced00a861f813c SHA-1: 933b104fccf3c14823add5c7741bfd873cd0d732 SHA-256: f3d7b0ca15a17cfc000ecfa31c7ef2b6a054890b97710160083fefccba67c5f2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=reloading+bench+design+plans
    • https://cdn.sqhk.co/jojikoxazew/ieifZjb/easy_crossword_puzzles_for_beginners_printable.pdf
    • http://ellmax-site.xyz/8316551918fl6gz.pdf
    • http://praktika-ingenieur.com/renewavezagosivuxav9z3xz.pdf
    • http://fasekafalig.scienceontheweb.net/shell_script_interview_questions.pdf
    • https://cdn.sqhk.co/neseleko/cia6Big/44645027150.pdf
    • http://pewekelexu.mygamesonline.org/ashby_materials_and_design.pdf
    • http://xijonofupawulo.mypressonline.com/filthy_frank_book.pdf
    • https://cdn.sqhk.co/givifevulo/jcDjVnR/animal_rescue_games_2020_drone_helicopter_game_unblocked.pdf
    • http://kisedevobale.22web.org/controller_for_sunbeam_electric_blanket.pdf
    • https://cdn.sqhk.co/koxopumo/jjMbpic/bekenabatanadepusapireles.pdf
    • http://rigoditibalun.mywebcommunity.org/zegunewamis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://napilidowolaro.rf.gd/amazing_love_chords_key_of_d.pdf
    • http://najukelosuned.myartsonline.com/nisinufuve.pdf
    • http://widepidaba.atwebpages.com/70980936855.pdf
    • http://vepilezora.epizy.com/75032441518.pdf
    • http://resilasijajatil.myartsonline.com/pifimudugatizituk.pdf
    • https://uploads.strikinglycdn.com/files/6184a8b2-4d24-496a-aafc-f014fbf0329c/do_the_twins_merge_in_vampire_diaries.pdf
    • http://wuzuvulas.epizy.com/smoothie_blender_reviews_consumer_reports.pdf
    • http://pozonijegexovu.epizy.com/best_madden_mobile_hack_no_survey.pdf
    • http://kugukokoner.myartsonline.com/goat_brucellosis.pdf
    • https://uploads.strikinglycdn.com/files/051673fc-74ba-4e3f-9ad1-9d13d1f699b1/basic_computer_hardware_interview_questions_and_answers.pdf
    • http://rodexiguv.onlinewebshop.net/56145872265.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_off0000ee4b.bin
30eba6d651364d1ac3851ebd16e1238f29d9afc2299c2b8f9148793b01099e9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5384 bytes
font_01_sfnt_off00010099.bin
0bd8d40042f3e2f9d496980fd602d4fa717f33c1cd43778ba2ce61e6db15d000
pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 10340 bytes