Malicious PDF — malware analysis report

Static analysis result for SHA-256 69989270bd5e3999…

MALICIOUS

PDF

93.9 KB Created: 2021-07-24 23:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 87f1c8932aeb0afe16224727a5b508bd SHA-1: 94b6a9db8dd5a0f2d98af4c9e66fc321c68c3d43 SHA-256: 69989270bd5e3999dd362b08cbc08c94d938a10173e10ce0594abe11e9ccf675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4b7d0452---97847330388.pdf In PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/10674141713.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/1837590882.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/lifijekulakexeludotigoz.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8927e7ef---93637752887.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/dobesubixoje.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/xulirimil.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/ligeseradutededu.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e30c87a0c5dc3dd481f21ea5809a8963/75984529013.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b81f042e61---misuvaxegabekojixoporiru.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b208139e523---3634969914.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/25c197ae5bd60cc8864d7c58750f5901/12594588289.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e5884a46---28647927899.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/l4515lufhpc4ch9svn52k7g8om/30144513615.pdfIn PDF document text
    • http://jaika.in/images/documents/files/35538097883.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5bqqag9vctp7rjpg9cqbdjkojd/91050037456.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/cc97b93cbbbc55805f5a2d6043396d84/93264941240.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf3b82e2f---94080212883.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/siwisirejafu.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/91669401350.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/eb5557792ccf1eff5dcdb6e66fb6b81f/22445342843.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/34566443124c780eaaa12fdacb5fa68d/buwepubimazo.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/36764544617.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8fdaff8b0049644985627d629cb8cf22/80234082652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=formula+de+la+media+aritmetica+para+datos+agrupados+por+intervalosPDF 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_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 11000 bytes
SHA-256: 14ad39ca15d88099eca20a9203a8eea142c5ea8c387f68c476c097365a859ff2
font_01_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 19508 bytes
SHA-256: f97910bfdc211a8d746f53ff68f2cd8567ea0af832f0b2d2d12d00df1aba0b0a

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