Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a911475860414d…

MALICIOUS

PDF

76.3 KB Created: 2021-05-28 15:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9dfbb028a630ee1ff775298e26c2b507 SHA-1: 08354d7875965905eff20004551b49c46bd8ea98 SHA-256: 48a911475860414dbf3d6f26f6f221057765483e8fa2e286ec97ed88678ff11a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

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://mezovuduw.ru/123?utm_term=beyonce+formation+world+tour+poster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412173/normal_600bf9aace6d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_6022f9ccadac2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478125/normal_5fdff82668688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_6068ac93b0c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_605d67615269b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_6007cd56a9f05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5fc9291030fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_601b593401a9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367308/normal_5fdeb38f96fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_602fa72fae1e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5fde619aad28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5feea2797c024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_601a1fae007ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fda8e6abaf7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_602ff8da03480.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c548fb4-9355-4d39-acd0-558ea52ded0b/how_much_do_american_pocket_bullies_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952ea5a9-2c81-410b-8d9e-4e2d2ff88d4f/nosibowoladimutej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5e8ce9-5ddc-4d5f-9341-d3ee4f70901a/rugex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e33882-68cc-49f6-82d6-b3abffe34104/wuximulobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deba5fa1-5eee-4229-aa3f-66fd6abd2180/sketchup_software_free_download_for_mac.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B4 5544 bytes
SHA-256: 23d43893a4df04b97bba54c3adf798467bd507c2f58bb8d30ffc61fb8c031957
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 13376 bytes
SHA-256: 79229c40cb2251d85ed5b4ba86385cc06bb3bde8963a4221f56ea5c1907aab23

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