Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62be377680e2508…

MALICIOUS

PDF

73.7 KB Created: 2021-02-09 12:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 38e70dfd202a60c3b6789b43eb4a36c0 SHA-1: f87a3aaafed94934bc5efd86f187b140e4a89d38 SHA-256: d62be377680e25086225cea6a51f0e67d94945a4c2fe7bd9be5ae1921aa3afa0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by multiple heuristic firings including PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS. The document body, though heavily obfuscated, suggests a lure related to 'Strongest bone in the body', likely a pretext for phishing. The primary attack vector appears to be users clicking on the malicious link within the document, leading to a phishing site or further malware.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=strongest+bone+in+the+body In PDF document text
    • http://santaparker.store/942190609065ours.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/ZlUiagc/fosasava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5fdab7c8370d1.pdfIn PDF document text
    • http://odemebayisitrafik.com/wegewonemowutajuk8ro8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fddf9a474af9.pdfIn PDF document text
    • http://samozanyat.info/how_to_change_your_username_on_edmodv7y9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494165/normal_5feb34b3314fc.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/boujc2h/3063763050.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/jhkoP86/70039782456.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/godewumazek/lovikuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/81364896419.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/mexugidebo.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/60717282919.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/chrome_extension_video_er_android.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_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 5188 bytes
SHA-256: f35dddcd8e0867bdf2d809a2bafafd51ce6e184bbc4652cf0b08d67a5349ea32
font_01_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 11476 bytes
SHA-256: 8dee7d7587c9d845dffff53f9bf0659c377b07c0c04b6e9a6148ee49c79d25ab

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