Malicious PDF — malware analysis report

Static analysis result for SHA-256 1915a7faf1a1d6cc…

MALICIOUS

PDF

88.1 KB Created: 2021-10-20 18:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: c28f77a48ca32de31bfa482e0e875078 SHA-1: bb473e6013f16345f75b44586f19c68d1d31b897 SHA-256: 1915a7faf1a1d6cc8cb95de75ae8b2f4344cc1ce6c45f1e0e87e1f73e1ad9798
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ketchas.ru/uplcv?utm_term=jaggers+doggie+daycare PDF link annotation
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/71238090704.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/kunenazadubexixaridepa.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/4764236435.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021100802044973499.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/4921811610.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313af033a62---sukedevotepin.pdfIn PDF document text
    • https://megalight.lv/uploads/files/66495253918.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/84186511740.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369d04542b5---novelapaz.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/pafejetepixo.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/vepakozokasapije.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109150608295474.pdfIn PDF document text
    • https://bczenekar.hu/files/file/keperusakejak.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/31090786192.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/34887304438.pdfIn PDF document text
    • http://ijfbn.com/editor_up/nijubesujinebasupenazigu.pdfIn PDF document text
    • http://chikatere.com/Upload/files/29250503376.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/73978040467.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/87671686478.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/99264601433.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/tozuxabofuxugen.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202110061700486325.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136eaa2952fb---72474751819.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d799.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD799 17468 bytes
SHA-256: 9e4af6ea45fe4cefccfca24ce51c0a103884ef3d7af16109ccc3d2d4e5d49794
font_01_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 18624 bytes
SHA-256: ea413b7d90ab651eb3bf0833d850c9d98271e98e2162b1d9f97f1ee86d1fc95e
font_02_sfnt_off000122a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABE 10400 bytes
SHA-256: 02678e79e2be90f59159abeee7ade652f7e993ca473ccdd90b2693d4c4dc07cf