Malicious PDF — malware analysis report

Static analysis result for SHA-256 539967702540c40b…

MALICIOUS

PDF

71.5 KB Created: 2021-02-10 07:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a33e15a9d2e614fe7b52fa05880a6104 SHA-1: 61ec15f7d83e31de22b1bc520e94a0c12de66075 SHA-256: 539967702540c40b6b9cb23ea6ffec8b5bd9d8bc6a12190e1c131bed9e3525cf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics as malicious, including a high-severity rule indicating it's an image lure linking to an SEO redirector for phishing. ClamAV also detected it as a phishing trojan. The embedded URLs suggest a phishing attempt, likely to trick users into downloading further malicious content.

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://bologen.ru/aws?utm_term=russian+accusative+case+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369324/normal_6007af18b0755.pdfIn PDF document text
    • http://tiktokhd.design/2256749615697a0w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5bcadbc187.pdfIn PDF document text
    • http://momentshop.website/livipiwogebarukinurorotofyl5h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413467/normal_5ff275daeb318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5fffafa11b042.pdfIn PDF document text
    • http://kokogasuwesoge.22web.org/konflik_agama_di_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/jghxQjh/cheap_motorcycle_helmets_for_sale_near_me.pdfIn PDF document text
    • http://indital.space/roxupetuxaix2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495387/normal_5fdd766d3cb06.pdfIn PDF document text
    • http://parrrtner.xyz/womupaliryfdt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5fdc09cd0c998.pdfIn 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://s3.amazonaws.com/tikofaketonub/14271355855.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC51A 5024 bytes
SHA-256: 139851b5fac810e9c9682e3cff58363f4eb5dfc8960017adb81139eba153b9d6
font_01_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 14172 bytes
SHA-256: 66bf5959b5d33cc2b6775d453410a3bd11751e91ccea0db1295e7162bc6e247f
font_02_sfnt_off00010320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10320 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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