Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e46503c05bcd633…

MALICIOUS

PDF

83.0 KB Created: 2021-03-05 20:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ca42237ecab900cf21888b9f43ce4be2 SHA-1: 74f6192fe7bc58f30cd38fa66717f781bdd2db02 SHA-256: 0e46503c05bcd633f42d96b70952a65353de89a60727e98c38c90cfd01cbfb88
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'stress relief activities pdf'. No scripts were extracted, but the presence of external URLs and the ML/AV detections strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=stress+relief+activities+pdf PDF link annotation
    • http://zolepop.mypressonline.com/princess_diaries_3_movie.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/woloperuki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_60064fe386df3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5ff1bc96e804c.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/blood_bowl_list_of_teams.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/3857793995.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/99500859053.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/rAgiXij/65635198472.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/hVQjdjf/redbox_new_movies_now.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/puledowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuraradaso/83368272232.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/luwalinu.pdfIn PDF document text
    • http://mojigoka.atwebpages.com/salunejuruxilaviwomuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/schneider_circuit_breaker_selection_guide.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/imdb_tales_from_the_loop_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91981821-abf2-481c-8ee0-c15ef78750b5/slam_poetry_22_jump_street.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/59193346148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69860ac4-1095-4e6a-bf13-ad9759bbf8c7/22067187210.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/modal_verbs_worksheets_for_grade_6_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/joshua_s_law_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 4884 bytes
SHA-256: d1a1d29ee0b78e7f2bdd8e931114bf7d9fc9c01d7ba94e878edfd28d9c366f61
font_01_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 10244 bytes
SHA-256: 6d1dee3ffcfbc88dd38724becb89a5cb2c5d583bcfd618e8d52e1d95458efc3a
font_02_sfnt_off000130a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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