Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c9ca4844db44e3…

MALICIOUS

PDF

99.0 KB Created: 2021-07-01 23:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cc71e9bb339de95da0b2ab3c5beba02c SHA-1: fc4ca55bb57d406e592f3d11f654acf05a90b8b9 SHA-256: 60c9ca4844db44e3b9ec7f062d563e82f1f029aeec352505535cda03b293afa2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories 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 distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://sanaspinler.com/calisma2/files/uploads/miwiferaminepevume.pdf In PDF document text
    • http://resetimpianti.it/reset/public/file/91626354456.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/85611584014.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/gozezekerilevovamale.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/rifede.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/75870c551627e4e19072eaa183bbd33d/zonilanobelewurelobo.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/zujobat.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/sagato.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/d111c31bce5cc5fc76689214959404be/94477257092.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7bf27e3e380e85a81e040d470b531102/69758623210.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079e02081b2a---10455897419.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855bf6ac582---fovubixexoliwodu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dd4118383---rediviboxetadiv.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/63415063724.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/fb2382b7960d25dd25b2e527aae0e970/visobitewisugitekegori.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0540d8c6---7699377936.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/387873571.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/19838296946.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/16312219069.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2a9610c3537177f6b58915ad2b848b07/75380429867.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160795e9ad79cd---ridufokivetevafozimelitid.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/bemubizipuweneri.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/bapikabikonisazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+keep+score+in+horseshoesPDF 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_off000120f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 10432 bytes
SHA-256: c6ff90c8a6a06a4a05547bac9080b38bf2fef48edb2f000069c2240a223d3190
font_01_sfnt_off00013895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A7 17564 bytes
SHA-256: 4f5763b7db586526ab97a4329bc279a7bc32b87427b30714ceb3d25591c4ba8b

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