Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc4919685af2c2c…

MALICIOUS

PDF

42.7 KB Created: 2020-11-06 12:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6a3934a32fd0aaf7ba3dbb65241b079 SHA-1: 5911270e38fff4a0d010711cf5f8f030f561f691 SHA-256: 4bc4919685af2c2c449286cbc08f87c8ce693427dc0843b0693ed2dc6be7048c
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or redirection scheme. The ML classifier strongly indicated maliciousness, and the document body text, though obfuscated, contains keywords related to the embedded URL. No scripts were extracted, but the presence of external URIs and the ML classification suggest an attempt to lead the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=new+center+school+tn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f9cc507d9852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_5fa3ba6f585fd.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/jepupelujozino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f9c36c04ac50.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/zexusij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f8d6ddc7a4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f9ebdbb16492.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/3379626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f899d2b7db6e.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/muvunekagok/lagezi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/accounting_equation_class_11_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/55999290972.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_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 4740 bytes
SHA-256: 53496b3654770443147226ed30c3a30649353ebbb579a859177967982bc76757
font_01_sfnt_off00007a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A38 10632 bytes
SHA-256: d1de5c90fd71fa8ebee8bfd857fb7424a66f0ddefd8ba3d99361da2be016102e

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