Malicious PDF — malware analysis report

Static analysis result for SHA-256 036bc8d73b20b646…

MALICIOUS

PDF

60.2 KB Created: 2021-05-10 05:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c74b2f67aa6ea00f5d2b4d9b86813cd SHA-1: 84fb4596c04b30b83fcc1a21d271e16475179e47 SHA-256: 036bc8d73b20b646113b56f974b9bc76fc19ebab4cb6df64867b87a2dafb4244
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malware or lead to phishing pages. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8404

Heuristics 5

  • 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
  • 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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5nog9suq00ad63l3gp85j8u8i7/pulerinosinesizi.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607088afa06f9---vapagokamoritesivijofixoz.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3dc12407f---rojefibebuf.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca846953e3---disuf.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a548f5887c---xadigironupexavuv.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/724893fbf9d9d364313c6e6a0eb25c3f/wanokaxuketi.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160847985c5aeb---rusimese.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/9ab8c894535a2689139ed4afaefe025a/bapaxijamajalofifol.pdf
    • https://promise-land.com/upload/file/59959778972.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774bafa170e---96591019448.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hog5tl01mvrttcnkieo7iqdojp/20973922081.pdf
    • http://jjmcp.jp/userfiles/Image/file/vutalino.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fddf87a26c---96702036764.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc075c5cd3---16987820825.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/i88k8ebamsul3fmd0dclk7lg3b/64510764451.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/fm46esrsh7sanuncstn65tdnmh/manolemokiri.pdf
    • http://axiomestates.com/userfiles/file/28261753485.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/1bfa73d57ac5a73d5a13a742a9fc0342/papokadapikozurop.pdf
    • https://silverwayshipping.com/userfiles/file/vutuderuxumosiligif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=spanish+interrogative+words+worksheet
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb1.bin
d7a07588c34d517990c592f3eeb7cbd263d80a2dcea89a67dc4bb0167db3472f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 5508 bytes

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