Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc280efbc331a14c…

MALICIOUS

PDF

71.0 KB Created: 2021-03-01 08:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 39a29f950d78ec490308fa53a5399c1b SHA-1: 794717576ac420410c58b87426ddd107760d303f SHA-256: bc280efbc331a14c7e2de9f132f735550fbeac3c70ef3e11790d2427219fe98b
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://seumenha.ru/award?keyword=easy+outdoor+shuffleboard+rules PDF link annotation
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/012167.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/a30jfjg/27274977976.pdfIn PDF document text
    • https://gukofatupov.weebly.com/uploads/1/3/1/0/131070505/ae63c133cb6ae.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/jahfij9/grandpa_gifts_from_granddaughter.pdfIn PDF document text
    • https://cdn.sqhk.co/gojikanemiju/dey1his/space_wallpaper_4k_download_for_pc.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/pakabesu_kukuban.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5ff7e56a817af.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/what_is_the_salary_of_cabin_crew_in_indigo_airlines.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/NhUgghh/69679403739.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/edafaab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 5192 bytes
SHA-256: 192d0a07af3c2fc7b8909d112d820a2777388402869c89945bcda8c9153660f0
font_01_sfnt_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 10440 bytes
SHA-256: af4c942af2888aff1816e63fbb86f1e8485a4c93253906f923f29bdd5df9ec3b