Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f21568db892a57b…

MALICIOUS

PDF

74.8 KB Created: 2021-02-20 10:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4caf4e28cd06fb4f42b8478d76f3b9f3 SHA-1: 1f6562ee02730130cb3d34981877abc3f4caec7f SHA-256: 8f21568db892a57b5d1edaf362a712a4f5c6d2d0ec01825f2bd1d2843aeb9ac5
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/8385080.pdf.
  • 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/wix?keyword=garmin+approach+s3+manual+espa%25C3%25B1ol PDF link annotation
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/8385080.pdfIn PDF document text
    • https://muwewemumefiga.weebly.com/uploads/1/3/0/8/130874681/febowomoj.pdfIn PDF document text
    • http://vezerfa.xyz/36852917925yb9ex.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/1185015.pdfIn PDF document text
    • http://insurancecarusa.com/apkpure_video_er6l12u.pdfIn PDF document text
    • http://bokugezus.66ghz.com/25280818823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_602752dc2bf08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5ff48bbe5b938.pdfIn PDF document text
    • http://obzorov.site/kaxazarolozufefaburif0.pdfIn PDF document text
    • http://bipiraxas.iblogger.org/generos_periodisticos_de_informacion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_5fd10eb1a7324.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/vatakefojunib/mijixeviviwizu.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/25109517242.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/elapsed_time_worksheets_year_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/dujewitu.pdfIn PDF document text
    • http://filirepakej.epizy.com/pimuxotilibonelak.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/auditing_notes_for_ca_ipcc.pdfIn PDF document text
    • http://gulizut.epizy.com/19065210762.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_off0000e6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D4 5580 bytes
SHA-256: 0b4b84a9fa65baff96c5fda4b0cdf53befe84dfd092c9ad09971e1d7291281d2
font_01_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 10280 bytes
SHA-256: 7686843592fe10b58f77636c47234b12196be60693cd7e81642e6156dc88cd9d