Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d3fb48ccb3f706…

MALICIOUS

PDF

82.5 KB Created: 2021-04-24 11:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 154f49d7ca5f86038724e346347a0fe5 SHA-1: b030cbf4e82336789a2791f6e237b2b39e84881e SHA-256: e2d3fb48ccb3f7069220f1c806ce3af5636a3bd7faeb156ea2a06f8a547b37cf
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 external URI pointing to a suspicious domain, which is likely used to deliver a payload or conduct phishing. The document body, though heavily obfuscated, appears to reference academic content, suggesting a lure for users seeking research materials.

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://jumiwimov.ru/strik?utm_term=critical+appraisal+of+qualitative+research+example+essay+using+casp
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/mikimikewomitumitiwa.pdf
    • http://worabipupe.mypressonline.com/7046033470.pdf
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/5162188.pdf
    • http://smartradiobf.ru/what_type_of_clothing_did_peasants_wear_in_the_middle_agesm93px.pdf
    • http://reduslim-siteofficial.site/10678634373tqsjg.pdf
    • http://pedaxofanor.mywebcommunity.org/vitexisuxilizazefolufimeg.pdf
    • http://smeshnoykir.space/up_scert_books_download11t4j.pdf
    • http://idealica-italiaufficiale.site/5599375544821ytj.pdf
    • http://vkysnaya-eda.site/how_to_replace_epson_et-3750_maintenance_boxmlnc4.pdf
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/lejurufiwolilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c01083c-324d-46a8-966d-b1dc99d850cc/solutions_manual_-_separation_process_principles_-_seader_and_henley._2nd._ed.pdf
    • https://s3.amazonaws.com/xurixado/tricky_brain_teasers_and_answers.pdf
    • https://s3.amazonaws.com/vovuzize/lucida_blackletter_ttf.pdf
    • https://uploads.strikinglycdn.com/files/030f5a64-a956-463d-af25-ad85fadd5e1d/how_can_we_measure_the_efficiency_of_an_algorithm.pdf
    • http://visevagopar.onlinewebshop.net/59737017508.pdf
    • http://likewiwojuxus.atwebpages.com/ronuf.pdf
    • https://s3.amazonaws.com/gazivemon/bibox_app_android.pdf
    • https://s3.amazonaws.com/suzixegazunow/tenilujujuwikisuze.pdf
    • https://uploads.strikinglycdn.com/files/756c4d61-1a59-4149-b51a-8db17e5b16a8/how_to_hook_up_logitech_z623_speakers_to_tv.pdf
    • https://uploads.strikinglycdn.com/files/96079759-bfbe-4dd0-ac32-efad5535f712/fukonikarijatubugobebiji.pdf
    • http://zijurape.atwebpages.com/9181064210.pdf
    • https://s3.amazonaws.com/silubebebefuju/movie_app_tamil.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_off000101f0.bin
2c7367449f254d103b6a567203de7563e7e4550694f975ec9fa8cb6143633ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 5688 bytes
font_01_sfnt_off00011531.bin
96a38ba4c97308d1e90d67257d335bb98d603cd796db8ffcc078f1110a03d387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11531 11472 bytes

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