Malicious PDF — malware analysis report

Static analysis result for SHA-256 40378e80cba23f8a…

MALICIOUS

PDF

72.6 KB Created: 2021-02-28 18:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 31fc7345c398b3347e69c0c32bb0ec13 SHA-1: 290c1497517a9c707911dc72db8b41d77bd319f9 SHA-256: 40378e80cba23f8a2431ee3e547c5104a37226eaa12f72dd2960e8738223c2ed
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=how+to+build+a+wind+turbine PDF link annotation
    • http://lobulezinovux.medianewsonline.com/kefigewovufenilotajiviti.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/samsung_printer_not_printing_multiple_copies.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/eigfF2e/bemiwafuxikonige.pdfIn PDF document text
    • http://pudumalezedokav.22web.org/28266398441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_601b478cd3d0c.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/visagogijulep/fewezuwubazifebagujij.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/bronchiolitis_nhs_inform.pdfIn PDF document text
    • http://jidusepagezet.epizy.com/couple_images_black_and_white.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/75172396510.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/55954561677.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/how_to_produce_canola_oil.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/asian_platform_beds_solid_wood.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_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 4836 bytes
SHA-256: 942c97b852bde3211f86a2f4106c1951b2bb171e158b5ab6246db5c27095abf7
font_01_sfnt_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 10596 bytes
SHA-256: 544e052a723d2b36f268c6c95041eba45df9ac988b5e5eed0339e7536c0b4824