Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b36cef030fb09d…

MALICIOUS

PDF

348.8 KB Created: 2022-03-27 17:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 501de4ed9e6aad08e402fa54b326ab18 SHA-1: ff627b5c7413abb5db698648cf77d85d8d7eafa4 SHA-256: a8b36cef030fb09d2e49560faad6e8adcea6bdeb0c56c2d4f953b9c252f09e9d
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7916

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
  • 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.
  • 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.
  • 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://podar.co.za/XSRYdR1H?utm_term=se+ha+perdido+el+pueblo+mexicatl PDF link annotation
    • http://avanti-kuhni.ru/upload/files/88104462168.pdfIn PDF document text
    • https://cira.thinkabit.net/downloads/files/63737767178.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/1608753965621862532491d.pdfIn PDF document text
    • http://smartbazar.online/app/webroot/upload/files/vesadutoku.pdfIn PDF document text
    • https://poetnazrul.com/kcfinder/upload/files/xanexusupireminaxu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621ec5dc7a61a---bumazixa.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2022021023174473499.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/27814321719.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/53980546252.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1622a318b89499---39050287013.pdfIn PDF document text
    • https://bticino-rozetki.su/kcfinder/upload/files/mepumijugimuru.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/figefetuz.pdfIn PDF document text
    • http://zavodmdu.ru/userfiles/files/lajomesit.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/bimeposizulufawapiga.pdfIn PDF document text
    • https://receptlap.hu/files/14269998774.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/c6e9137cecb0899d1fdcee9b2c9aeaef/48631635864.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/edda2ae4c8a0d7032ba025e9b6c1d9c1/tosidatofewuto.pdfIn PDF document text
    • http://rsst77.ru/upload/files/sufunubudutojox.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/41696184738.pdfIn PDF document text
    • http://www.siposferenc.hu/html/wewel.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/nozidagur.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/mitapovasopi.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16238885fee7ec---funimufiwis.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_off0005002a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005002a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5002A 20444 bytes
SHA-256: 058d26ecd8b66d7803b74eb6a3d235e5268dd63465ead7eafd23794923d977e0
font_01_sfnt_off0005343e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5343E 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00054b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B5E 10924 bytes
SHA-256: c9e26cf8a442d64f633579f31c955f47f13b3842487c8170f9dd3fcfa644df1e