Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5359572f0f2f3e…

MALICIOUS

PDF

69.6 KB Created: 2021-02-16 21:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ff00374efb47b3cbd2c9f46873daf3f SHA-1: f4500b65d148a26df4d08db10fbf04debe0776e6 SHA-256: 8a5359572f0f2f3ed5511861a59e55cf8916ddcb2d2b95fc0536da7a66cc3985
136 Risk Score

Malware Insights

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

The PDF file was detected as a phishing trojan by ClamAV and a machine learning classifier. It contains an external URI and an image lure pointing to a redirector URL, suggesting a phishing attempt disguised as a free download. The document body is heavily obfuscated, but the presence of a redirector URL indicates an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=johnson+25+hp+outboard+carburetor+adjustment PDF link annotation
    • https://cdn.sqhk.co/vagofedewat/sYZijid/bricks_demolition_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gzHAjaA/91166586520.pdfIn PDF document text
    • http://lufatomitonad.22web.org/java_6_without_oracle_account.pdfIn PDF document text
    • http://vidapabil.22web.org/97673737484.pdfIn PDF document text
    • https://medijomozu.weebly.com/uploads/1/3/0/7/130775841/88137.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/bdidqsy/72316998183.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/755266.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/27259613339.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/hbrzD3G/somelegokuker.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/nufidibodudulad/18861170159.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/tovaxafalubotaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/wofavivutevowufijekazeda.pdfIn PDF document text
    • http://varitumowu.rf.gd/beyblade_burst_evolution_full_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/playing_card_background_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/kojiveguwiwepamijuzuzisas.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/setuduwetolitetabeli.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/15562657768.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_off0000d075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 5744 bytes
SHA-256: 084311b4217fd143b42b14bede1f881a33fe18d4540a34decea80aa77494286c
font_01_sfnt_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 10932 bytes
SHA-256: 36c312367d7e3b8e10fc68d53434a796e33790c25a65802534f3144c0fafc50f

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