Malicious PDF — malware analysis report

Static analysis result for SHA-256 3479ec445cc9fb43…

MALICIOUS

PDF

67.4 KB Created: 2021-02-26 04:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a945f866587e21fa7612aacf987ce9e1 SHA-1: e538b92f75e4f71c6654434e2bb477724c83fccd SHA-256: 3479ec445cc9fb43ca2986864c040995923d5a5c8a75b0e88786d80076457745
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=algebra+nation+section+5+topic+9+answers PDF link annotation
    • https://cdn.sqhk.co/sopiloroda/ibiaYnk/wifibutulokezumigalatuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5fff340e51df0.pdfIn PDF document text
    • https://cdn.sqhk.co/nonatedogo/MBRgi7j/defender_hd5_forum.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/cyCjjhd/airfare_to_vegas_from_denver.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/28a38677c37b251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_600d2ce95a487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_601d3681a40cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6012fda83c149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_60217e203fba4.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/jDhcPPB/phoenix_craigslist_cars_and_trucks_by_dealer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_6007393b8afbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_6032bb5f52391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_600e327f14fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ff19156c0df8.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/dukexajuj/modal_auxiliary_verb_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/faloxetoxanomodisinet.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/shirley_ryan_abilitylab_formerly_ric.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_off0000c986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 5600 bytes
SHA-256: 723b31f52625f55493e86215be29d8aaca867d5d5e9bf20c291e2bcf674c965f
font_01_sfnt_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 10412 bytes
SHA-256: 004a8a6c4ba5fd470d180d52e7d8b21eb89cf6df95de5c213f7f3cbdc3f8a39c