Malicious PDF — malware analysis report

Static analysis result for SHA-256 4508d69e46023696…

MALICIOUS

PDF

273.3 KB Created: 2022-01-21 14:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-25
MD5: 295e960204d5e490746f313415661788 SHA-1: 62749b2af8737c312d57a7d9aee9bae4fffc701b SHA-256: 4508d69e46023696fa7404948c18b5b25bbad53db53348a3dd2a86915830bb3a
304 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6683

Heuristics 8

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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.
  • 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 http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161c957ccca30f---pawidavi.pdf In PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/zilegulutolesujogunoz.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1617ee83344077---76752195213.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16161bf629b31e---97746665280.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/13639058583.pdfIn PDF document text
    • http://sport-celebrity.com/app/webroot/kcfinder/upload/files/kukebukatejovege.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/xemepukov.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161d36559e4db7---doseribuxiwawixanejutovi.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/74666356242.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/duwomat.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161878e9b578f1---40461358665.pdfIn PDF document text
    • http://agilesolutions.in/uploads/nulawomugu.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/teduminodifemal.pdfIn PDF document text
    • http://bernievet.ro/kcfinder/upload/files/6613211265.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/97199967568.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/33914036083.pdfIn PDF document text
    • http://jessica.yelivery.com/cote_dor_import/admin/ckfinder/userfiles/files/72781160433.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/gavisug.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/ziresaserawukejabuxumari.pdfIn PDF document text
    • https://rambud.pl/uploaded/file/27293182592.pdfIn PDF document text
    • http://kshp-company.ru/userfiles/file/35264889518.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/77819337681.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/79230164687.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/2882585017.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161c8334a37e3f---xuzidilaseruzaxebusuviref.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/pexofepewadez.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16177993d2b357---jorizuj.pdfIn PDF document text
    • https://infrive.ru/uplcv?utm_term=wallpaper+hd+free++carIn PDF document text
    • http://kolaykanal.com/userfiles/files/13681538592.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 extracted file (font_00_sfnt_off0003c5e8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003c5e8.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C5E8 10128 bytes
SHA-256: 574e223f8b94e2dd462422f7c71a021104057637c6bb99683e2051fb17e18b09
font_01_sfnt_off0003dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DCA2 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off0003f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F1E3 17440 bytes
SHA-256: 9248023c82a129b0909effc3e44315094ac44071cdc106cf0681c1f66f971d13
font_03_sfnt_off00041f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F49 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336