Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a826d691fe46e1…

MALICIOUS

PDF

80.4 KB Created: 2021-05-03 19:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d648e4ca2cea1771c87d976175d67322 SHA-1: 9fb6b4484dff25734bec60b9831e7dd7c8bb83fd SHA-256: f7a826d691fe46e13400ba53ef6efd606e09f5097c64eb39e31a31aff947e8c4
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'dark series'. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=did+dark+series+end
    • https://cdn.sqhk.co/leporolino/3gehdlH/retronix_international_mesa_az.pdf
    • http://moxawunanenubop.sportsontheweb.net/adjectives_english_french.pdf
    • https://cdn.sqhk.co/komajekolino/aai3jgW/98727791662.pdf
    • http://tonedomopoja.scienceontheweb.net/animal_farm_student_guide.pdf
    • http://xojanefod.mygamesonline.org/samoxujupuvepun.pdf
    • https://cdn.sqhk.co/wovupeni/e9jcVs0/online_coupons_for_walmart_electronics.pdf
    • https://cdn.sqhk.co/gasupewu/e4jdigC/boom_cards_speech_therapy_login.pdf
    • https://cdn.sqhk.co/kowalaxu/Gahetgd/android_java_checkbox_list.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wezukep/examples_of_social_learning_theory_in_everyday_life.pdf
    • https://s3.amazonaws.com/tinivukedeta/gesedovawewegimu.pdf
    • https://s3.amazonaws.com/sirilagewuga/fesevojaxafod.pdf
    • https://s3.amazonaws.com/dazuxujepov/thrilling_adventure_hour_episode_guide.pdf
    • https://s3.amazonaws.com/muxozuvalubi/78616190250.pdf
    • https://s3.amazonaws.com/rodigapigeta/altair_hyperworks_student_edition_free.pdf
    • https://s3.amazonaws.com/fomudebipefasu/99642749280.pdf
    • https://s3.amazonaws.com/jotogorurekuro/the_raven_cycle_gay_characters.pdf
    • http://vigavanoxe.onlinewebshop.net/cellular_automata_tutorial.pdf
    • https://s3.amazonaws.com/wumodukubaru/zuliziwekiwazopilosesezo.pdf
    • https://s3.amazonaws.com/zusevamasor/amazon_kindle_problems.pdf
    • https://s3.amazonaws.com/belopudevuzuza/what_is_the_best_organic_chemistry_textbook.pdf
    • http://panexorumilogim.myartsonline.com/kodefisopapopafopojanuxit.pdf
    • https://s3.amazonaws.com/rujabepifar/retajuwu.pdf
    • https://s3.amazonaws.com/remeranexe/laboratory_apparatus_and_its_uses.pdf
    • https://s3.amazonaws.com/jinabom/crab_rave_piano_sheet.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_off0000fe9c.bin
fe0a430b85558cfc0f975a0b78d840c5d30f49e02567cb1b5093108c8f89902a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 4848 bytes
font_01_sfnt_off00010f30.bin
f972e696345eecf80ec7a60b2e35c691cce5f81d2c67e34a234017cd91cebd5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 10792 bytes

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