Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5270f6d43f80fb…

MALICIOUS

PDF

77.7 KB Created: 2021-01-22 20:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0c20a6e1eb0382b7bd824135c71b713d SHA-1: ca66e109ff00f84c7a8831d04c65bb716e4068eb SHA-256: 9c5270f6d43f80fb81051f09d8919966fcc2cf6be27492ca7c2230a31bf2b33b
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 flagged by multiple heuristics, including a high-severity rule indicating an image lure linking to an SEO redirector for phishing. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URL points to a suspicious domain, likely serving as a lure for a phishing or malware download. No scripts were extracted, but the PDF structure and heuristics suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=u+shaped+stairs+with+landing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501057/normal_5ff08b6937338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5fcc45787b3e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5ffe4fd1ee9f1.pdfIn PDF document text
    • https://site-1177423.mozfiles.com/files/1177423/66672211147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451544/normal_5ff974f840c9e.pdfIn PDF document text
    • https://site-1172011.mozfiles.com/files/1172011/frases_tumblr_de_amor_sad.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/jjcgjeo/hockey_manager_2021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5feb185600752.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/5ichghd/super_mario_3d_world_switch_best_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/cmibZij/power_inside_aurora_heart_mobile_legends.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462046/normal_600321bac6233.pdfIn PDF document text
    • https://site-1168038.mozfiles.com/files/1168038/wevodetujuzadifipin.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/NrjgtE7/empires_and_puzzles_training_camp_20_heroes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393181/normal_5fdde55966d2f.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/ahj7UoR/77171929684.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/idBibig/endless_run_oz_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5ff4c976bb773.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/4icchiA/wanezo.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/lonozote/6776005456.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/13603707210.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 5304 bytes
SHA-256: 07123dd3443b6c6568babd893f95a72fdda6b4440ddcecddea30c518afb5b87d
font_01_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 11352 bytes
SHA-256: 1174c8f67c328750ae65aa65f1ed9628212b370e93f124449ec249c84848ee0d
font_02_sfnt_off000113c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 16164 bytes
SHA-256: 0250545ef5ea7c232323ba9cd73ff257c0f47b778ea4156b5c9e23dddeb59f7a

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