Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a2c5198c5a97fc…

MALICIOUS

PDF

79.0 KB Created: 2021-09-23 08:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ddc962b126f8d1c359e8c5b553fad2dc SHA-1: bc0cc423de4b82171371dff790d6c48ff814f085 SHA-256: d4a2c5198c5a97fc059a4d7e87cd8af52979784d4fb1f7ed7a585e2ae6612dc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the ClamAV detection further support its malicious nature, likely as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://oniceh.ru/uplcv?utm_term=harry+potter+books+download+for+iphone PDF link annotation
    • https://togeltop.net/contents/files/17999629733.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/fakiwef.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/mutedemafate.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/pamadizusilavovuv.pdfIn PDF document text
    • http://aurora-c.jp/files/files/zabevexufamotitubo.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/funulalavimux.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/56853294034.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/3226356654.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/97395229065.pdfIn PDF document text
    • http://becucci.it/userfiles/files/88325392040.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d3bbc209eef19dce4ca3b64d26e6068f/4593231741.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/43125045640.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491939d4a73---90061949939.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/54524604979.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/pezoxumusenexokatejag.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/93393369871.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/20720376595.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/joxisugiva.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/2311291300.pdfIn PDF document text
    • http://rideco.hu/upload/file/ritugizipowinevegixapig.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/33955928050.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/22722395882.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/88df095fa6a0e1e7546852e0142142b7/sonevepinetabilazajenarod.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_off0000cfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDE 17276 bytes
SHA-256: 84b8f6deec4cbac8a655f5685f904bb03d1142b193f1bd423fb6fd77c7473545
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 11020 bytes
SHA-256: dc70c91cf03ac50897dea12845f052278ebc56e73f81725dfffc94989f9648cb
font_02_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1