Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d33d9bd361b5b08…

MALICIOUS

PDF

69.5 KB Created: 2021-02-23 12:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4f71a2668f8af086acbcbb957963e28d SHA-1: 304ae8c437895b415351c0066802f08c378cbdd7 SHA-256: 1d33d9bd361b5b08cf587b66608e0ad4de51999b01cbab47e8cc817b13085450
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/123?utm_term=entombed+left+hand+path+cd In PDF document text
    • https://cdn.sqhk.co/kerutadit/1hghfGB/pictoword_level_42.pdfIn PDF document text
    • https://nuzuloluxeguvox.weebly.com/uploads/1/3/4/8/134874948/4326120.pdfIn PDF document text
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/5923366b.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/g8JJibq/71460288470.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/Qqliadb/animated_3d_weather_pro_apk.pdfIn PDF document text
    • http://nncucuucuc.space/netflix_series_away_rotten_tomatoesx2xk2.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/65ii4gh/free_fps_battleground_cover_strike_3d_commandos.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/5jbjahi/danmaku_unlimited_2_1._0._15_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/etijjar/shooty_skies_secret_characters_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/4pD1hgk/tiere_stricken_fur_anfanger.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/7KG2rG1/commander_legends_booster_box_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ieCIigf/22040571628.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/6282413.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/jgtgihd/olympic_ice_hockey_rink_size.pdfIn PDF document text
    • https://cdn.sqhk.co/wifurovud/jjhygdf/dominos_delivery_charge_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/9hiiaZK/griselda_records_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hjgchgt/retro_wear_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/igc4Svl/minecraft_pe_furniture_mod_2019_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC562 5216 bytes
SHA-256: 23102d9d9580f079a565b519b0f70940885946e73aa5714c0a92712c8460db7e
font_01_sfnt_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 15768 bytes
SHA-256: c9b482de868a811e744424a9e3f4b68f8993fd5f99db0e9fe5f9a8999ea218ab

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