Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70a62d61bb7b118…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 06:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 67d5299f8ec29a8c3aaa193f77bba9d9 SHA-1: 0f068b66a6f2315bff65abeeffab1ad467e282bd SHA-256: b70a62d61bb7b11804fe2b1b42c4a169c2874dee2a880963ffb3f4576a1e4797
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=civic+maintenance+minder+codes PDF link annotation
    • https://cdn.sqhk.co/koxixoneto/icAghIW/92303808070.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/fojulusezil.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/plACuhf/my_virtual_pet_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/jheibhf/ruweso.pdfIn PDF document text
    • https://cdn.sqhk.co/vateviti/ibjcjbv/ludo_king_mod_apk_latest_version_free_download.pdfIn PDF document text
    • https://bofopigefofimun.weebly.com/uploads/1/3/4/0/134016695/1635382.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/3387492.pdfIn PDF document text
    • https://cdn.sqhk.co/binuwaxe/boCr4WW/cake_decorating_artist_salary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://savagit.rf.gd/renejixuvibabezesudodipux.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/alvida_alvida_mahe_ramzan_mp4.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_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 5020 bytes
SHA-256: d5fc4f84511e19d0b98d38747645a360ebd02b57d4b1f79d0851444a3bac076d
font_01_sfnt_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 10660 bytes
SHA-256: 08c4ca257211d38a668767980882dbd658c1e6180e7ca439707eea9aa598eb2b