Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec5fb022fe29449…

MALICIOUS

PDF

84.6 KB Created: 2020-12-24 11:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 13dca622940752691d576eb2cb21fa68 SHA-1: ffc37338dcdc58b8a7b86360f3da4318aa0c454c SHA-256: 4ec5fb022fe2944913a1a40d3cf7f64988bb0dfd416b0c9994c42c4619e32e33
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic firing indicating it's a phishing lure using an SEO redirector. The embedded URL points to a suspicious domain, likely intended to trick users into providing credentials. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the PDF structure itself facilitates the phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/strik?utm_term=bubble+pokemon+green PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f8ad4b3738bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5fb68fde1f930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_5fc37f82b1593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fbf79228bef2.pdfIn PDF document text
    • https://cdn.sqhk.co/nivuduful/jbbhcgg/verizon_my_fios_sign_in.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/ibih4jC/vasosudijiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5fe3f7dad8f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8746cbc367a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd3220dcb296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f9673a100841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_5fb4b26e0e419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fc8c62e6c1e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8971cae-d17d-43dc-9ff7-fc65ab690d82/comal_county_cad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0601eaa5-af66-43e0-a82e-5f9d2fc17fb5/lafetoxijika.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 7516 bytes
SHA-256: abd69f57755439849c4d6d607855453c93a3a1a5e928e1b4e8bcf2db8c5a9324
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 5004 bytes
SHA-256: c0665cb93fdcadd7d1c99ab6d9511ca03e5edfae339239232a4b5d398f7d1795
font_02_sfnt_off00010508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 7256 bytes
SHA-256: e8ac6f19c28e77170652167d1e53273c9881707a8cfc32ef41e606e34fdc3111
font_03_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 13816 bytes
SHA-256: cd0ea3b904cd4716fccc4409a707e17417d61de8baf78f6336c04ee8764383be

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