Malicious PDF — malware analysis report

Static analysis result for SHA-256 692a00dcddcefeb0…

MALICIOUS

PDF

71.5 KB Created: 2021-10-02 22:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1c274b3d227b7d477a8113e9109c34e2 SHA-1: 83c3844cb9d31802f3a4b7c43c068d74bb3d311b SHA-256: 692a00dcddcefeb0691a734da903b1ba9c5b320b888a0ded9055617561301d1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded links are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=technological+innovation+examples PDF link annotation
    • https://europacreativaeuskadi.eu/files/galeria/files/dedetup.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/siliburazofisugafu.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/77172200808.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/24293168148.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/32937443433.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/navetulipebesajag.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/84117009346.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/burakekowarelosemiv.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161472739b2016---74702872872.pdfIn PDF document text
    • https://trainova.com/userfiles/file/kekimeped.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210918162803488.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132f55b91fcc---55474033731.pdfIn PDF document text
    • http://gains.kmvindia.com/ckfinder/userfiles/files/nugogudobal.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/44779100676.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/68273073121.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/31708872888.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161568e6341933---88819493763.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/sodegevapa.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/golenu.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/dedenofiz.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/jararuwabojole.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/depolojemodeli.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/95593976044.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_off0000b1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E5 10852 bytes
SHA-256: 36f855ad3e92d4f4db6148c67253d16657ac72d3efb6ee2497f03dea729042b9
font_01_sfnt_off0000cad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD3 17688 bytes
SHA-256: 5098f11eaab084b840e4c1f7e6ac7e65b8702e979d1241f1295ddba6ecb18a2f
font_02_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1