Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0eb4f43b36615b8…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 21:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 4454b530784fa9fd799d0f43fbb3e97e SHA-1: cd9c9ff715ad3b25459433a812e7ad1c27e6ebee SHA-256: d0eb4f43b36615b862070f60a9397a144d1dc9cb49debfdd600714cfa84eeeaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://clubkdo.fr/img/pics/files/vebadelosegerupipuzejejo.pdf In PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/puduriwalidizamalakusil.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/qftnf93thmvpt2ebfnsdfga926/86943487267.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/36132710343.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/55150201805.pdfIn PDF document text
    • https://wecareprogram.org/images/file/xokifiriralebetevozabefag.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/dd9142211d2f232d4d7ccbf5277c3668/93854480251.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/94846760619.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b473530327b---gawovumetag.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/fonisewaje.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/56885010734.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/95063312366.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/67081696858.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/ponetedumobeduken.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/okbernqluchahj83rve9can9s2/samaz.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/disifafufejarozo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28ed775d93---78744797646.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/navidaba.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/71297681818.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95a07f1e5---xefesad.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/55720581013.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/kevijoxagazebelolug.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/26287131524.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/vawakuba.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e19c322d3---25639757988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=apc+back-ups+550+manualPDF 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_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 10596 bytes
SHA-256: d02a38abe2d70ca7c2c1ea7f2b57edec082659dbd39bc6a2c72bf98972874a00
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 18584 bytes
SHA-256: def9f045eca181ee0f06f42ae93c942451d79bbb7fadc12ec51533ad3c0d9da4
font_02_sfnt_off00012ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1