Malicious PDF — malware analysis report

Static analysis result for SHA-256 27065da958fcc051…

MALICIOUS

PDF

96.2 KB Created: 2021-07-15 13:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c8095908926c71cc983ea174843b4c3a SHA-1: 4ba1f885b34dcd5125a86cf5e9e58f76a28e8c33 SHA-256: 27065da958fcc051b9f16a9f96e150b01519a0ca882d4dd9c2017c402d6cd588
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://greenvalleykerala.com/ckfinder/userfiles/files/72315250758.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/89o0rubtlkf2qm4voh6melac2q/tawamixotevexuvaxebo.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/87059823026.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/wakuraluborozesavowemiriv.pdfIn PDF document text
    • http://capital96.com/userfiles/file/88353997706.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6ad4bca2---wiwurepawexagatifiso.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/d7omi09h8jevp6fpl19dvro1db/6882452346.pdfIn PDF document text
    • http://canadanur.com/resimler/files/dorimamubatovanusetivi.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3e53915cec21c80dfc073f73ae58dac8/kazumesasutifuwopozivobad.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a88dc3321a7---xevimizavigukikaf.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/32555560141.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210511023013.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/s528vdlei3cqjsur32s9g9mkvi/risidivadopilibivos.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/bf79nviv3uunjafisbtiuudik3/83952986499.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/60957108806.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/pekagirivupunurugevajad.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/03ca7437c0a6a774bb1ab25b4242ab3c/80034892263.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bebb0680a5---36151246216.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/lenuza.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/56839527360.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wawix.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/zozazosada.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/tosatibonibefusubipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+importance+of+being+earnest+playwrightPDF 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_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 18728 bytes
SHA-256: 46644d3cec01542ca6255f50bc2f284616fc69b3a519748b6f8d9d2bcb3db3c7
font_01_sfnt_off00013f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F90 11228 bytes
SHA-256: d73218551984a913897a2343100510585f92ad7b039209efac90ac208fdb66b4
font_02_sfnt_off0001598f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1598F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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