Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9df65c632df707…

MALICIOUS

PDF

75.0 KB Created: 2021-09-02 04:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db3521ee2ea8c64a6de37eb9adcc489e SHA-1: 16310fea07bc51ad51a1593654491094aa31cf14 SHA-256: 3d9df65c632df707c3b1fcc76df03df4aa98fe105bdab9902205811b17e45bac
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and link farm heuristics strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ae7fc0bcf6b23f737d35f9258f52e730/paviwor.pdf In PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/an2tu1es9rlio9hhoa34072jg0/xadenozowupinerusewu.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/19607804553.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/xikulekegap.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/83325085411.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/tb6ib43urlgj37dil247g866pr/vatovelejiw.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/05b69d8d522460647a2514bbd8044301/70268421146.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/fifow.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/gac7e6nib5h8bvm6855v4vnk41/zozizamelel.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a93790de3c---13283914156.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/xedezutuvapatetar.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/53737732383.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/uj18sd1s6qvfb67dhgrue76pm0/37951520232.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/86075936065.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/tigawazafenitijibaxevo.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6437d2660e---mawefisulesitirigowoxurud.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/55830873517.pdfIn PDF document text
    • http://gr-chem.com/upload/files/laditixuwirodaxa.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/67775142896.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/10026991789.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b72424c81---38987459965.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/94684401989.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/luzavamebisexoxeji.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/ximadibax.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/kavaku.pdfIn PDF document text
    • http://cloverdiamond.com/file/tolijatijoloruvuzi.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/10217225337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=drum+lessons+for+beginners+pdfPDF 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_off0000c4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CC 10820 bytes
SHA-256: d05b154aca852525a396f71243ff0a2a24b7c0fafb48edfed7359730aea5a764
font_01_sfnt_off0000dd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 15840 bytes
SHA-256: c0d8f17ff549ba686a0059ab6a1d564d93fba1c0450e9d0fc69828e913421363
font_02_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.