Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af19ea91a01c733…

MALICIOUS

PDF

317.3 KB Created: 2021-12-25 01:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: fb8492e65bbc33966759fed5b4274c56 SHA-1: cba4aff36ac601c0ccd46e822825084762129fe2 SHA-256: 4af19ea91a01c733c759983be9dd20b85041361435ee32b29884f02194c990c1
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7766

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 http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/8345653448.pdf In PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ba92524d31e---xikabefexekumemi.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/bemojumexofi.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/52526184797.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/41238239890.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e824f27568d172787006bc503020b68/vatemaladabut.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/fogazesuweruvawidobiv.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/vebogonezatixiridif.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f2f8d59a86ead83b45cd0dcea166f057/kabowefisogopipofotilino.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1619f6ac4d102b---57224299557.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/vuxemol.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/migew.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/zewawuvuw.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16155a82907887---gemikusinijizaxowumomobi.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/68525917015.pdfIn PDF document text
    • http://eternoohydro.com/d/files/nanubet.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161387469a5d85---32756309201.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/49722803806.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/126327787.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/69263898936.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/vaxepizowepemodemi.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/fuvenajonuwigukilobi.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/83785473251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/RC0zOYPQW8A/uplcv?utm_term=anghami+plus+apk+2018PDF link annotation
    • 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_off00047be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BE0 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off00049284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49284 10924 bytes
SHA-256: b8cec56ec0ad8fa787f925eb89027b170ad072cc7522ce2d82735f8733714758
font_02_sfnt_off0004abaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABAF 22616 bytes
SHA-256: b5679de394b48ad89a8b3056b035df48572b5b58a428782cba05804b3ab3995b