Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc823af7921d53b…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 09:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: 469d9e34f6319f02929b000a8a3afec8 SHA-1: f0cfe1150738ea342287e2dc7b2f5a72b91493ae SHA-256: 1dc823af7921d53b2d2bb5333c3ffb2bbc428917ccaf6afff9bd501713a67591
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=hd+games+apk PDF link annotation
    • http://hoilhpnqbthanh.com/upload/file/nakasenilifukesumelaf.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/kosevenudifar.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/donubizaf.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/xiberodiroda.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/10871627823.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wozedazuwegefe.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/86072300813.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/98317281527.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/2610495682.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/69907973769.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109112051533055.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/jekudawerufuwojugidoxima.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/52979891555.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/jodipamazil.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/32253066473.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130510ba41b1---60962985529.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/53940583354.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3f75a82f7---10438563746.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132661a9b710---63807381674.pdfIn PDF document text
    • http://one9five.com/userfiles/files/42528886450.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/mabotegajaxulimatumira.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_off0000cc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC06 19180 bytes
SHA-256: fa72084471fbf8b47eebbf69d7faba7f85afb0e4fa7a5eb15b112b2606c31b3d
font_01_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 10256 bytes
SHA-256: c09db3bb28e4a66079f7b0211c37e3b312b05eb6a82a3da71db4beb4df03207d