Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9945c17e3d2938b…

MALICIOUS

PDF

64.8 KB Created: 2020-12-23 07:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f698d166881d40c7cc5a576b96551370 SHA-1: bfcb1b7472c528fbed62e2f933465021e6ce7107 SHA-256: f9945c17e3d2938b7af5b8b71e5d45dadaa275c323879ab18540680c824dc723
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, which is disguised as a search result for 'julie american girl doll books'. This indicates a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/123?utm_term=julie+american+girl+doll+books In PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fceb70d15508.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://uploads.strikinglycdn.com/files/ef49eb0b-d33c-4887-97dd-1d0c9d013d1c/quadratische_gleichungen_scheitelpunktform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9c55f5-dd4e-48ac-bee4-6f4f8980d8b4/3445565390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7b9a18-0d27-4d2d-8330-1efbda81ec98/26950335582.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/ccrn_review_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd31098-c665-428e-80c1-56698fd8b4ea/4014142512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892c202e-1ac1-4905-9576-b007bee959c2/percy_jackson_and_the_olympians_movi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0d40a5-708c-4b36-8df0-3249f404f634/8532370321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f73dab6-57ca-4038-94de-3359333a5877/89909872021.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/project_report_for_biomass_briquetting_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/33887593283.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/the_equalizer_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/70389836458.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/arithmetic_series_questions_with_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_off0000b447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB447 5256 bytes
SHA-256: d7d786445457ebeecca01c60b6eb2b17cbcc80bd937a58f7ddcf93664b6578eb
font_01_sfnt_off0000c5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F7 10192 bytes
SHA-256: 22e8daf684b17371263cccb32cf566fcf65360d71fd13dd93251aac75c9929d3
font_02_sfnt_off0000e841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE841 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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