Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d31f171370dff01…

MALICIOUS

PDF

74.3 KB Created: 2021-03-04 06:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c49e4a6cf17b1d96e260d882a259bb4a SHA-1: 60743bdebdc8063dfac203f47053967e66a218ea SHA-256: 8d31f171370dff01c29fa09db034ad74eda25ff04fefb4a1ca213a7acca2b85f
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/123?utm_term=how+to+hook+up+dish+wally+to+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5ff5e68c25711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_600b135eb0450.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/42931881765.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/best_rock_ballads_of_the_70s.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/rodigapigeta/soxepotofiwigonav.pdfIn PDF document text
    • http://fazemiwasagi.epizy.com/98768149755.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/about_social_work.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/33603023195.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/xoweburepumukagez.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/94100316286.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/ariane_5_flight_501_failure_report.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/agatha_christie_books_sinhala_translations_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/agreement_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/fault_in_our_stars_book_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/ultrasound_guided_occipital_nerve_block_cpt.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_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 5232 bytes
SHA-256: b1f8371e57fd616b035a1f58e07b72ddd0ebaa2c4d0a983c13eedae6404031c8
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 10776 bytes
SHA-256: f9e8cd1ae971f67679c9956a3c00c70187e9dd28b39e5480097ef1bad22abe3b

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