Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0149503fab8ea6…

MALICIOUS

PDF

65.8 KB Created: 2020-11-28 04:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4745f5bfc9feb1f72dd3326c89911af0 SHA-1: d2c82eb7ae383f878a5ce2481e37dbb71f8662b3 SHA-256: 4b0149503fab8ea63d2345f154b447c6db6774bb631422816484817a613404c4
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=coventry+ri+school+registration PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466175/normal_5fafb42cc2b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8b4fb7430fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_5fb96feee7a95.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/bokofapig/lukexo.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/siwubi.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/jojo_s_bizarre_adventure_season_1_episode_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87744f19-6c93-4818-a1c1-b204550a56da/51830799669.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/lasisixo.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/dokkan_battlefield_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/67529816804.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/19120698746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83e1762-cce0-4f5e-89d8-afb71dc01d9d/cjb_item_spawner_how_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/kozemejasama.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/95082232016.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/football_betting_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/jinapusodawuxaputa.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_off0000c3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C8 5128 bytes
SHA-256: af607b91c3c829b22af0d050aabcc3071f17a509ed820259415e5cce32cab4dc
font_01_sfnt_off0000d548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 10888 bytes
SHA-256: e168f8921eeee1af674d29a316fd6e9dec12ad66b197c7f5f2ef63e443a3c8cc

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