Malicious PDF — malware analysis report

Static analysis result for SHA-256 55255279f7f0e55f…

MALICIOUS

PDF

244.5 KB Created: 2022-01-19 23:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: 0d4e410e8e1bedede5e198dc9a3f011c SHA-1: ea19cd875744304b2f96cfdc8e58a1e7f956adb7 SHA-256: 55255279f7f0e55fa39d0c2843002f08c7b8169b844518361ed181ffb5b784ba
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6483

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://www.diplomat2014.ru/ckfinder/userfiles/files/sesegegoxozejuti.pdf In PDF document text
    • https://miminku3.com/contents/files/86778479934.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/kulufibogupefe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16181a46d672da---talokunuropiwowixas.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/43643114984.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/87306509257.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161da59f2f2b6b---28911866439.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/mubisizokikuxufi.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/sakojofuzekeruvewab.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16168cc6754924---vumitowanomana.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/16229674105.pdfIn PDF document text
    • http://myesen.life/userfiles/file/36684511883.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/sawakadadoruwezavodafa.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a8a737a3948---12495807676.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/niduzajovazufapod.pdfIn PDF document text
    • http://schokofontaenen.de/idata/13373947239.pdfIn PDF document text
    • http://tese.in/ckfinder/userfiles/files/81463464202.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/sozirutezobamawe.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/murewudifobaweno.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/50230901833.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161e45e2ea0ddf---34431420710.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16185f8b7bfca6---morevime.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161a21ca4f3e5d---50099483160.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/nitivemij.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/76821311055.pdfIn PDF document text
    • https://www.cuadernosmanchegos.com/panel/cuadrodemandos/assets/ckeditor/kcfinder/upload/files/37982655753.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/4215616477.pdfIn PDF document text
    • http://viaecommerce.com.br/kcfinder/upload/files/nuxukijajivogabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/D9plVHj2VOU/uplcv?utm_term=airdroid+apk++freePDF 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 extracted file (font_00_sfnt_off00035f09.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00035f09.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00035f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35F09 17112 bytes
SHA-256: 0c23053dfcec8cd8f5418146beaf4715d78eaf82447f3a14b74918a03a52ac4a
font_01_sfnt_off00038b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38B7F 1976 bytes
SHA-256: c88e4f02ddb4c8e5dc1f1082eccfef438fea6caf2fc8b06123bf3207f254f7b3
font_02_sfnt_off000394a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x394A7 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_03_sfnt_off0003ab4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AB4B 10148 bytes
SHA-256: 5a902141261f93898524f923e1ea62b1794a8bac730cf5f91be781c639a62aee