Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12f08580329614e…

MALICIOUS

PDF

70.7 KB Created: 2021-03-02 21:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 96e0880e36db873762036e3c073ecdf6 SHA-1: 3b91809bb9121c218080aee9aaa2c62eb13c15bd SHA-256: f12f08580329614e08e3b02268d642ae131840af480c3abe4f2f82fed7b1b85f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=sandwiches+word+whizzle+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455657/normal_602b865af39bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_6001caf113e02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_6015a417101a1.pdfIn PDF document text
    • http://cmbmarketing.agency/uses_of_computer_for_class_2_worksheet37jns.pdfIn PDF document text
    • http://onlineeshop24.xyz/buttinette_katalog_20201p47t.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/f15ced05a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_601d4b398d946.pdfIn PDF document text
    • https://vozunekoba.weebly.com/uploads/1/3/4/9/134902797/321cdf1cd9c.pdfIn PDF document text
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/6897438.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/tapexiw/tv_guide_au_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/sample_audit_trail_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/bitosefoxijo.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/84653023042.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/burrito_bison_mod_apk_2._83.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/wexem.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/baahubali_2_tamil_movie_free_tamilrockers.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_off0000d988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD988 5272 bytes
SHA-256: 6a7b2ab9aba5160ccda1914c3aeb3fd6147b0e29ac78e8ae3e6512af14f55309
font_01_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 10148 bytes
SHA-256: c45871f4c7410f4588f346ef09f5a244c2012721329d242e2ae0f0b45d0da8f1