Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63d6a6a5b49291c…

MALICIOUS

PDF

74.6 KB Created: 2021-02-25 21:37:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 32ac1bd6e1b5bc64ddedf9dd724057c9 SHA-1: d0ec654df970eac66754ac36bd24b3f553cebc41 SHA-256: f63d6a6a5b49291c4d6a392c5fb1cbee9fb78d64ae1c4caf2634760dbc43d119
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://druttle.ru/award?keyword=what+temperature+should+my+whirlpool+fridge+be+at PDF link annotation
    • https://cdn.sqhk.co/gobavata/jhbjjii/small_world_money_transfer_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexufi/ogh131B/spaceship_phone_wallpaper_hd.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/5b4daf1.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/jhijcbc/roly_poly_monsters_1._0_72_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tokejosanawo/bjimxg8/play_earn_money_app.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/YgesLgj/modern_warfare_warzone_download_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/LwhfbVm/87565159936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/66151598713.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/kesigivujijoregakomilox.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/manual_audi_q5_2010_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/suwunuleturuxojize.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/gumedarevibakemoma.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/visuzododop.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/replay_ken_grimwood_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/cutting_edge_third_edition_upper_intermediate_answers.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_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 5800 bytes
SHA-256: 1245173276ba34b588483919de8f2b0ddbd17260a2ae05da4204d6850756a1c0
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 10656 bytes
SHA-256: a24ed4b7c58537ab9caf0de9dda9146ee0e692738b3fd7a153adfe4fb16f5081