Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b1b6c308ac7807…

MALICIOUS

PDF

81.5 KB Created: 2021-09-18 01:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: c8a5795d8ee3e69dbfabdf26d123994a SHA-1: 613eded5f3859dd3733ecec9bd3062bfe1b6eede SHA-256: 72b1b6c308ac7807831d5a19264ebebf2dd475a82f1cf2fe8a6f827a89db26bc
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=free+mobile+app+download PDF link annotation
    • http://proficlim.ru/public/userfiles/file/merezaworudonuluvow.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/wavusobopanunib.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbf9f368d6---tazilerenitedewubikanax.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161450c44b2928---40887956519.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7b20beb3---gixosejikokuxedovozopasu.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/xarur.pdfIn PDF document text
    • https://harmony.im/userfiles/file/84156471414.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/30635978902.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/vudibuzuwixogolemex.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/58878394610.pdfIn PDF document text
    • https://telorgabus.com/contents/files/29449504831.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/vimezibosopak.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210911/file/polisatole.pdfIn PDF document text
    • http://vhz.cz/user-files/jowifiruponuduvuminulu.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/kbhfqkg8g0naedc7in3gbf301p/japetofedada.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/buzuji.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/18182334291.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/92516901252.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/xalegatomaboz.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f26069495d---54368932500.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1630922790.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/zeduwimifewimija.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/64526182146.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/zisazefabuzoti.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 10488 bytes
SHA-256: ba3043c6390b56f9ac8749650e8dc934e46a2fa58a99ded33cc025abf599f9f7
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 18004 bytes
SHA-256: 4496d5be5073a05f198d25f32eb5355b0458dc51165cd18e4e146340f3fec942