Malicious PDF — malware analysis report

Static analysis result for SHA-256 a415b77acb6c8741…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 03:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8819e55522b216a4240fee32e1aed55e SHA-1: 3cfed99a5b9138e6fcf5fab347b28988094670ce SHA-256: a415b77acb6c8741bb2c4a6f0e9c8a9ceb8cc6129195ac108ec337925487a90f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is a strong indicator of phishing or scam activity. The ML classifier and ClamAV detection further support the malicious nature of the file. Although no scripts were extracted, the embedded URL and the nature of the document body suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/award?keyword=what+is+dan+harris+net+worth In PDF document text
    • http://julivojurukumu.sportsontheweb.net/nipizapuvawetowo.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/pride_and_prejudice_movie_online_subtitrat.pdfIn PDF document text
    • http://electorat.org/electric_circuit_live_wallpaperw111d.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/king_kutter_tillers_used.pdfIn PDF document text
    • http://inostrana.com/21937629320as36y.pdfIn PDF document text
    • http://smirno.life/viga_baldrameqf3az.pdfIn PDF document text
    • http://madewithsunshine.com/tofowabebarojizopajasiq8jno.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/civil_engineering_firms_in_atlanta_ga.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/tuxexi/daxosatojibogane.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/black_panther_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/cisco_sourcefire_ips_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/wuvozomaxub.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/what_are_the_roles_of_organisms_in_an_ecosystem.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/82706174787.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_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 4988 bytes
SHA-256: e65400412d867e8d2b0171b3485c075310ab3822cfb155d1ba7c61fbc9266398
font_01_sfnt_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 10888 bytes
SHA-256: 1782298148bd599d720f3b4cdabbb7e2204c224bac2f29643e8339a22cb1e421

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