Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf9dc79fff7c2bc…

MALICIOUS

PDF

69.2 KB Created: 2021-03-05 08:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 204983321cd19422a4067e7772786df8 SHA-1: 54f8f672de66bfdbd16fdffbd48bcf35085ff7e3 SHA-256: 9bf9dc79fff7c2bc08dbef1b753828ad6ad09104ad80c2b8db1f5a7d78fabd1b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/award?keyword=hp+photosmart+6510+ink+amazon PDF link annotation
    • https://cdn.sqhk.co/pivokazi/rjaghhn/xolezo.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/sulawidaje-gobasadapav-lufifi-gudatisubinalo.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/bemerufitomuvewepelawaf.pdfIn PDF document text
    • https://nibebelijatod.weebly.com/uploads/1/3/1/4/131452937/vatawosadixofa_towutuwidamenez_milumepuzilito_lutesibetaguxuf.pdfIn PDF document text
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/melowideruzukazu.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/2VpHti0/leo_dictionary_french_english.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/41775981692.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/where_does_nike_ship_their_products_from.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/KieTwhd/rojuzifolot.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/tom_clancys_jack_ryan_season_2_release_date_uk.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/faluzotixupi/us_history_1301_quiz_1.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_e2292e125abd46f0893182959c570fbb.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_c7f34d5bb35d4793b7545d41b1dba394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/film_bioskop_indonesia_preman_pensiun.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/un_papillon_dans_la_cit_free.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_3a42644508b44a39b70ed8011b739a9d.pdf?index=trueIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_f35dde1527544c51a3f7e7e3b5b84774.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/bibekiforaxoweranug.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/context_clues_worksheet_1_answers.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/bojizofepexu.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_2b5647f75b36467db66832a423b9613e.pdf?index=trueIn 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_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 5576 bytes
SHA-256: 84e68e7e3c4242ae9251ec269ced6aaa8f8904992fa67f220727438a1327946f
font_01_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10000 bytes
SHA-256: f6f977ed9163c2ed71cdaaef3dae5f59a6afc1aef3ded5fce27de74aacdd70a6

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