Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ef5e7a98b4ccb7…

MALICIOUS

PDF

66.3 KB Created: 2021-02-25 21:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c2f77650ed1fe7136dd11fea7b2ae5a4 SHA-1: 64e1b1411647258757ceaabdfb8367e3cd6a7391 SHA-256: f8ef5e7a98b4ccb719b758898042520abae90b120ab2fae4e90df1c66ded8720
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=does+swann+dvr+have+wifi In PDF document text
    • https://bulasekujamur.weebly.com/uploads/1/3/4/3/134377464/todid.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/niv_bible_gateway.pdfIn PDF document text
    • http://trelon.fun/tumble_tree_timbers_instructionsiofhw.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/solving_quadratic_equations_by_graphing_worksheet_answers_algebra_2.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/1390775.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/linear_algebra_and_differential_equations_uc_berkeley_custom_edition_3rd_edition.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/41558183220.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/47727847830.pdfIn PDF document text
    • http://vkysnaya-eda.site/zodaburepireguwudezena9atdb.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/groupme_app_for_pc.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/sirew.pdfIn PDF document text
    • http://powerpoint4you.ru/fezesobakexeponeze0uh7a.pdfIn PDF document text
    • http://xsafak.com/avakin_life_hack_no_verification1puad.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/gurowozenupifi/gosubaliwom.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/kung_fury_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/performance_parts_for_honda_pilot.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/wiwomapuxim.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/54001947760.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/37419304211.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_off0000c6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F2 5116 bytes
SHA-256: 94badbfbfe7ad7f6e061c15d793afd4c61b836826250c7f89dedb94c92ffc1cb
font_01_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 10028 bytes
SHA-256: ba035f4dcc29086438a0b474cdb7c2d40b55b28ccfc26043a4ffeabfffff5448