Malicious PDF — malware analysis report

Static analysis result for SHA-256 44557ca5038367e3…

MALICIOUS

PDF

71.2 KB Created: 2021-09-12 12:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 2a4f937d45ed79b57f24b4ac54c1a24c SHA-1: 0546bd48756f8a6eccdf1aadbdcdb37f94649f72 SHA-256: 44557ca5038367e361bca964fb978e3cfbdd97899829abaac91cdbf0e5828ba8
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sdhouse.info/ckfinder/userfiles/files/tozewusukasixazona.pdf In PDF document text
    • http://pro-group.ru/userfiles/file/49897885646.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/112150062985.pdfIn PDF document text
    • https://premiersuli.hu/files/files/latimaduwatodemeninuj.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/43218728866.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/kekobekebolobaze.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/00bcdb46f2db28e0fc7c9ce81fc329f2/55264659097.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/31ed21f1602ff75f083bc96f1aec7f9d/sewasasikoranalis.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/vofixazasexutukidazuloni.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/15264323570.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/df5bea5b81704f212d1d58f28f26e1bb/12988818753.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/54467472960.pdfIn PDF document text
    • https://avflash.nl/upload/files/feribusipokusexevumod.pdfIn PDF document text
    • http://jfe.hk/userfiles/rulurobuti.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/39432457114.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/kefuv.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/xofewimiduxapineb.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/retomalu.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/27524604746.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/tumibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=roblox+mobile+hacks+2021PDF 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_off0000b23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23C 17164 bytes
SHA-256: 0024aacb626b3e78217d4a30ad9ec84bf19a8b76e01ff36eda518b4c43ef6d6b
font_01_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 10868 bytes
SHA-256: 09240dc40271d4236b46d6c92b69d6b50f3bfbff39df61e4fecdfe84fd524de1

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