Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d152f93d1db68a9…

MALICIOUS

PDF

75.8 KB Created: 2021-01-04 05:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2f8685b61a344277f163d128baf8f359 SHA-1: 20ec690ea8860d2bfd674c5fd70291871a856895 SHA-256: 5d152f93d1db68a938d8df417454b508bf7c912f600995eb787b26e2a39cc18a
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, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a 'Hamilton beach rice cooker manual', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=hamilton+beach+rice+cooker+manual+37548 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fdeb29d6568c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_5faf879d042c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f91548bdd0ae.pdfIn PDF document text
    • https://cdn.sqhk.co/xobakidanav/fji1fhh/tumblr_girl_drawings.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/76deeeee-410b-440c-a46a-00c013580f6f/quadrilateral_properties_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/53612126216.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/adidas_annual_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a3c4cf-f58e-45ca-9c4c-079bd04ca139/kerelelosonisedigatulet.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/crocodile_skin_texture_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc87f74f-9c54-4037-a834-469193dad248/the_hard_side_of_change_management_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/software_backup_driver_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314ffbe5-6531-46a0-9348-68d60467f1ae/breville_avance_toaster_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62773cf3-9e8e-4871-843a-ac654ee27a17/zutupivifijuvusepofo.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/29597099192.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_off0000dc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC13 5560 bytes
SHA-256: c0f0bf2b42be756ee2489ccab942242057340d2c1a0e6322e1d75b21c3b0ec08
font_01_sfnt_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 10944 bytes
SHA-256: 972559594df193dc8c661c8750c650149736d94d7c0f6d8dd6fd0baf7f1c7cba
font_02_sfnt_off00011443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11443 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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