Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d4158885d26801…

MALICIOUS

PDF

144.7 KB Created: 2021-12-05 14:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-06
MD5: 31a803146d23541828d1a60b4d250e47 SHA-1: 6a5a9d82bb0f97b3baa9fe6f924c2a838535ec54 SHA-256: b5d4158885d26801b9e2fd1a067665c1cab38ba873f3b624354ab21fa623f824
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9567

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 http://ferramentabelleggia.it/public/file/pevidevoz.pdf In PDF document text
    • http://mail49.imgwill.com/editor/images/file/7710_20211110141320.pdfIn PDF document text
    • https://alohasafaris.com/files/28427909902.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/20415285144.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349765f2b00---58812700262.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202111020926402682.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/16537254619.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/zilagi.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/88823742199.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161a86fde5f54a---16044264284.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/28733369696.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/purikogamenibelemafovo.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/vebetafepu.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/16116249980.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/22104223401.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/fumopafotuf.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/53479742424.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/tefaduvukutun.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/42575923193.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/dumibezogidibimonuke.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/botusitegoberujulabidenu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ab5e7d906f6---76068024722.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/siputunotesuj.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616cb779b97ca---43955992354.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/93151898463.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/1hHberoKktI/uplcv?utm_term=where+the+red+fern+grows+accelerated+reader+test+answersPDF 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_off0001d775.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0001d775.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D775 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0001ee19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE19 10740 bytes
SHA-256: 6ca1d81bad7a47533886d7ca9cbd9fd8ebd86a3d0ffd664422f41ab406a69f7f
font_02_sfnt_off000206a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206A5 17216 bytes
SHA-256: 0b2347da80837a06809a74d090bc74d0d5d14e0fdda08de612b8c137c8023dfc