Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d4f0580affdcc3…

MALICIOUS

PDF

85.4 KB Created: 2021-05-22 10:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e34e90f452cb09a760382dae2fed2b22 SHA-1: 737d277f986f07fdc921682097c2fc6126e33220 SHA-256: 90d4f0580affdcc3ab258f0807ffa94193315b240d950e22ecfd8615f9a54e6c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'Vampire Diaries the Awakening' to entice users to click the malicious link. No scripts were extracted, but the presence of the malicious URI and the ML classifier's high confidence indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=vampire+diaries+the+awakening+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417818/normal_606336882b754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5ffb4034d2929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ddb80a-b3be-4d32-88f4-8d26bbe41058/halex_zeta_electronic_dartboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff06537e-5bd8-4e5b-8e45-8150b63fdbed/70295135973.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/85467445820.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/taurus_millennium_pro_holster.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/how_do_i_replace_my_trash_can_in_san_diego.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/free_child_consent_form_travel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/bollywood_movies_hd_300mb_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/kenmore_elite_he4t_front_load_washer_and_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/11931089395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e14ee1-9b0d-450b-a5f1-102c7cf32c07/eiki_lc-x80_projector_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/44255579909.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/pizok.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/napuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b593a60-52e7-4003-befa-65142293afa6/how_many_horsepower_is_a_165_massey_ferguson_tractor.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/escape_room_game_answer_level_32.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ce17a4-a0e4-4e53-b438-c7ec316f0c63/97731311339.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 5564 bytes
SHA-256: 8403735cf455edb96bb45d583ced171566eb3321eb05ea9d23da33fe5ce9ea25
font_01_sfnt_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 11348 bytes
SHA-256: dc19ab643459344df2b7a02592311419d067663c128a32655b6dc98c25697e91

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