Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce058a9769a09a56…

MALICIOUS

PDF

84.9 KB Created: 2021-04-03 14:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8eeb9f567b93d477f9c0a2a25f91eff0 SHA-1: 007047ec41ff33fca85afe267ac141cea66848da SHA-256: ce058a9769a09a56f923923ef4c777fa0ae5d3fa9b6b0a6242c2dc9e6eb96c85
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/award?keyword=mathematics+game+theory+pdf'. This indicates the document's primary purpose is to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=mathematics+game+theory+pdf In PDF document text
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/dewusovarajenu-judotor.pdfIn PDF document text
    • http://tibetterrier.ru/mumezixabajotut8zbrs.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://sugakibabusu.scienceontheweb.net/cry_freedom_oxford_bookworms_download.pdfIn PDF document text
    • http://getallcreditscores.info/20515449850319hd.pdfIn PDF document text
    • https://wivaralizufijol.weebly.com/uploads/1/3/1/4/131483386/dulazu.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/ganoderma_mushroom_cultivation.pdfIn PDF document text
    • http://presalon.xyz/39069846141osncx.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/2558855.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/cmfas_m9a.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/new_headway_beginner_free.pdfIn PDF document text
    • http://milanomoda.site/davoduteg023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kufazete/demographic_data_questionnaire_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471d9bdd-03b6-4ab8-b8a3-7f7abe68d51f/wexelafesapaza.pdfIn PDF document text
    • http://gezixus.myartsonline.com/wofipanaramutisodofixa.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/75036027016.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/imusa_pressure_cooker_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78952005-844c-4d79-b512-f59279332e51/91546355690.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/defarifesedugigabufigu.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/wagexugobedozurarixu.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/66762506960.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/how_to_find_a_lawyer_to_review_a_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977b718c-5c24-456e-97f9-c8fe21cc2276/the_wanderers_movie_youtube.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_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 5644 bytes
SHA-256: d71fe2c2279ce1317d2f002c3f92e276a40b5b2f847f6c3cf3a3e53ed7cd55fe
font_01_sfnt_off00011a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5E 14192 bytes
SHA-256: 2225c26965b9c0efc764918c56c190964e9bcc49d06f4b2914e49975d7e7ec52

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