Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac4c1a64fb2aff3…

MALICIOUS

PDF

67.9 KB Created: 2021-02-18 02:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c10a098852c25740908f94034c6876b3 SHA-1: 74383e564d91fdc5bb4b2358f8feec4d63ea2af5 SHA-256: fac4c1a64fb2aff324dc0e2704af106f07f45d8e870b80c2a91ae8913b4caf40
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=volume+surface+area+cylinder+worksheet PDF link annotation
    • https://gixebufenof.weebly.com/uploads/1/3/6/0/136082423/89757704fd2c2.pdfIn PDF document text
    • http://nowanedilado.22web.org/bhagavad_gita_in_english_free.pdfIn PDF document text
    • http://sbrf.link/moxipaizrkq.pdfIn PDF document text
    • https://divowotekek.weebly.com/uploads/1/3/4/7/134759223/5448654.pdfIn PDF document text
    • http://jsexj.fun/guzitevanapuxaxitogemenkzl6g.pdfIn PDF document text
    • http://leaninrzpd.site/formation_chaud_froid_et_plomberiewit5g.pdfIn PDF document text
    • http://lumacy.site/salaxogerazizidogcp94d.pdfIn PDF document text
    • https://rozuguki.weebly.com/uploads/1/3/0/7/130775318/3618173.pdfIn PDF document text
    • http://arevakar-travel.com/83423390772o0wj0.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/zodererezuzuxi/41101857206.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/division_practice_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/nox_android_emulator_windows_7_32_bit.pdfIn PDF document text
    • http://bejovivijif.epizy.com/hard_factoring_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/zobimisefedabixamenogegu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/kusetorisu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/all_american_trash_brockhampton.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_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 5484 bytes
SHA-256: cad1a6e2a0a107cd642cea8a534c16938380386dc98304f902567a058af58dd4
font_01_sfnt_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 10848 bytes
SHA-256: 8478e59b844688c7371823ffc7cae8ff9f7773b13a55b9dd4197abc5f27e1521