Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dcf15e607edd49…

MALICIOUS

PDF

80.3 KB Created: 2021-09-02 12:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: bc5a4df88607739d7b9ada8a11919e3c SHA-1: 740a0a899966cabc55e2b35a223784378d72d8d3 SHA-256: 54dcf15e607edd499535031e0f5be9453897d0c7dbfaddad61a0b7471b55ddf9
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF is flagged as malicious by ClamAV and an ML classifier, exhibiting social engineering tactics consistent with ClickFix attacks. It impersonates cloud document services to lure users into executing commands, likely to download and run a second-stage payload. The document contains numerous links to potentially compromised WordPress sites and disposable hosting, suggesting a distribution mechanism focused on SEO poisoning and link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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 http://toeicspeaking.net/_UploadFile/Images/file/mijaxeromarawozasidetuxar.pdf In PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/nilenejuwitewi.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/legolugaberizigen.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e51c512402504ea4d9bff555070dc48b/jovezomatibisowodefomuzil.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609886fa0ea56---rulubagasaropapu.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/bawewuwo.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/kagaluvixegorire.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/68268656812.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d7b539743745ba39563aa3dfcfe7c643/poruferaxaguvex.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/76808073278.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/tobegofoji.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/0e95999ac29391920d425f1410ab12e8/49181258695.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/87365242770.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/35805131449.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7drsockalk7gqne7fi1q6ci48m/wemepezasomamozux.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/549b1936fd04745b28f6a128da781483/bulatabe.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215623528515.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/90190722225.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c4bb7f6a---67038335376.pdfPDF link annotation
    • http://www.heatandgas.com//EditorImages/file/xuguvamukivexanazawe.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/62c39bb268b415bb968535861f485258/lekiwadimujalijaxo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/327eef02b4824ea219f1350a1c67b35c/18680622820.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/29938596594.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/birozeditukef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=adobe+pdf+editor+not+workingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 18296 bytes
SHA-256: 6bb612a4a9d957abef7a70f7d057f0b500fcb0a8b101b8ed047579b606e64adc
font_01_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 10596 bytes
SHA-256: 857a2fa2f1bedbe028e38f5f4cd4eb19df18de14807b657a565e5ec1d5afcb98
font_02_sfnt_off00011be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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