Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f38d6abaf0ae0b3…

MALICIOUS

PDF

102.5 KB Created: 2020-12-14 04:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3e6a83ad51a6561a06490ea96dca12a0 SHA-1: 7372740d3d637b0cfd96c7a4a1738fc3dd4ca0e7 SHA-256: 5f38d6abaf0ae0b307cdd8ec50ea4eccd1af6d60318e39e4481be6318196a5f4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic firing suggests the document is designed as a phishing lure, using an SEO redirector to disguise the malicious link. The embedded URL points to a suspicious domain, likely serving as a distribution point for further malicious content or phishing pages.

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
  • 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://trafffe.ru/strik?utm_term=stormbreaker+book+pdf+download PDF link annotation
    • https://s3.amazonaws.com/tevigotu/10951649733.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/arraylist_remove_element_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fd6ac589febf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5f9323db12f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f9610eb7ccd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5f9f2e364fc41.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/21431683899.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/kefak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fb779fcd926b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f9a3f97ab0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fab2b7c58f1f.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/escepticismo_moral.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/capsaicina_pura.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/comcast_on_demand_channel_guide.pdfIn PDF document text
    • https://portalspdf.com/0399246339In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0bcede7d-b629-4c1a-a398-82341fefe0cb/annotated_bibliography_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd7076b-5524-47d3-8d90-439607eb71ae/72815980489.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001479a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1479A 5148 bytes
SHA-256: 3a7df3a3b29f119202145ea08231110f0ce183552c444bfca503d3490bbfcff8
font_01_sfnt_off0001590b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590B 10948 bytes
SHA-256: ddcdc64594f80cc0a8a8151bb008e8cc969c3788364634d9cd2919cbc71102c0
font_02_sfnt_off00017e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E72 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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