Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af24d71e37e8e1f…

MALICIOUS

PDF

77.1 KB Created: 2022-05-01 14:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8b7722d18cb5ee06e892b5b4ed488946 SHA-1: 714cb91d6f1ae90a811bb3c7fcfede54904f4859 SHA-256: 4af24d71e37e8e1fb1ecfc3ba4c7035b4e8380ef4d5bc38dad4b918fbf42371e
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://ragaz.co.za/YmrXLWy8?keyword=android%20operating%20system%20software%20download PDF link annotation
    • https://dbmotorbrokers.com/userfiles/file/72523689357.pdfIn PDF document text
    • http://hosocongtyvn.net/upload/files/76237679086.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/ab5f15350e7e11d.pdfIn PDF document text
    • https://tazesudi.weebly.com/uploads/1/3/0/9/130969012/xoguvex.pdfIn PDF document text
    • https://devoporerok.weebly.com/uploads/1/3/1/6/131607733/9762317.pdfIn PDF document text
    • https://dulewexafup.weebly.com/uploads/1/3/4/7/134702005/6782011.pdfIn PDF document text
    • https://umartravel.com/files/dawowokibu.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/19708819779.pdfIn PDF document text
    • https://nuxaluvuwij.weebly.com/uploads/1/3/5/9/135997537/33865e8f3e9.pdfIn PDF document text
    • https://neruzokari.weebly.com/uploads/1/3/1/1/131164447/4250684.pdfIn PDF document text
    • http://kutyakozmetikustanfolyam.hu/kcfinder/upload/files/xadod.pdfIn PDF document text
    • https://javagiluxonuv.weebly.com/uploads/1/3/1/4/131406569/nuvabonovatot-gixubeke-kivomom-kamorun.pdfIn PDF document text
    • https://mafidusat.weebly.com/uploads/1/3/4/1/134109097/wavunubodu-tezivu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16244380f6d9d3---25125223953.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/lodipepomajuj.pdfIn PDF document text
    • https://gipodebitu.weebly.com/uploads/1/3/6/0/136000977/bawexif.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/75031057325.pdfIn PDF document text
    • https://evenements.gipso.org/ckfinder/userfiles/files/dimuxado.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/badon.pdfIn PDF document text
    • https://www.voyagegroupepascher.fr/public/kcfinder/upload/files/xalagukojata.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/7d5fa623ebca23.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC511 17312 bytes
SHA-256: 125891f4778eab5b35e0582d607f808c9ed2d3ff454fd4d18283923fb1d7afc7
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 11020 bytes
SHA-256: 5c7bc6215a5c7cb97bc210cc09039eb30b247f3cfca8b5b25f1f817247c643ee