Malicious PDF — malware analysis report

Static analysis result for SHA-256 a218ec67857bb520…

MALICIOUS

PDF

98.0 KB Created: 2021-02-26 19:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4ace4ff5635cf6474bf55b15af52ce8c SHA-1: 1d36c73c00a8a892f29f96b80f2c5d4a7cac0c78 SHA-256: a218ec67857bb52084df5edf103091e529fa53f75c2477e2b6a91e68125dc88e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

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
  • 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://pelibifir.ru/123?utm_term=kindle+fire+hd+7+2014+specs PDF link annotation
    • http://big-ita.space/boston_pinball_price_guideh26no.pdfIn PDF document text
    • http://edaruzal.xyz/28255693777nsbxi.pdfIn PDF document text
    • http://goldenframecollision.com/cellulose_acetate_sheets_for_salejkoq2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcf741156a6b.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/51356115798ldsl9.pdfIn PDF document text
    • http://choosemadam.site/gps_garmin_nuvicam_lmly2qi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5fd1b65028a10.pdfIn PDF document text
    • http://amst-watch-v1.club/ap_calculus_limitsqbjkr.pdfIn PDF document text
    • http://susurrus.space/41847782947mya68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5ff51f63a5301.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/gagagakigibapo/taxekafekegaroz.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/murujonukekivunazijuzej.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/ubuntu_14._04_iso_highly_compressed.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/46509918983.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/adobe_media_encoder_cc_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/how_to_use_line_6_pod_2.0.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/70123339258.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/1727571861.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/8983655321.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/criminal_law_books_india.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_off00013b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2A 5496 bytes
SHA-256: 7524f73e38150f98dede858262979032bb8d9f5f89fc84939f9e46c510059f42
font_01_sfnt_off00014df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF2 13424 bytes
SHA-256: 7b8bfa9d8207d7288eb63e739542c7554fff43b6680e47f4980700eb350c5df1

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