Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aace97282c8752…

MALICIOUS

PDF

71.8 KB Created: 2021-01-20 23:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f1f934ec966b4dbec29e2050d1d94bca SHA-1: c170bc3807c682a770a856a272bd1378f0a952b8 SHA-256: 90aace97282c875295b8e21983cba555e0e90920ec397030d09193b401fd0348
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=underhand%20pulldown%20back PDF link annotation
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/ef3ccd17b3006ba.pdfIn PDF document text
    • https://cdn.sqhk.co/sowovupo/fqjcxha/anime_wallpaper_boy_4k.pdfIn PDF document text
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/belazaleve.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/iinifhf/65544064393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f87829488182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f88bc8f1ce77.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/higuKOL/51033313056.pdfIn PDF document text
    • https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/voguzoku.pdfIn PDF document text
    • https://zezazuzomej.weebly.com/uploads/1/3/1/0/131070861/3532365.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/pulavokaxe/81204747306.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/sefojelipakunolup.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/59392484719.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/9673727619.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/18883632612.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/fifezutejalin.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_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 5272 bytes
SHA-256: ba6cb513b7936f43946248dfc23d41dcbbb778903fbe19d03456a8c4f8028e02
font_01_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 10260 bytes
SHA-256: a328c4b3422cdf4710cf672e3e031f478c03705f24d8da7074906213279f74f7