Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a926853f69c6e2…

MALICIOUS

PDF

89.0 KB Created: 2021-09-07 13:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ddfce0f0d38797ca52d0655f58a77df2 SHA-1: 9444d7ef7917cbeda24d24119fbbd4d6bb8a1aab SHA-256: 20a926853f69c6e22286698c26b5a0ca5bc5cabd79487775588ca0844a48dab6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6df5d91ba---54103631672.pdf In PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/numitudiveva.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/19813412741.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161184907f3d77---betinedotojuxunelon.pdfIn PDF document text
    • http://boldogelet.hu/media/webamekogofewuzuren.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cdf283506b9b99fecd345f4ee838d880/loluvasosegujo.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/49212110616.pdfIn PDF document text
    • http://torgoborud.org/images/file/81526612327.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/amefag.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/tifidilugawa.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/8571668631.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094833b4ea27---98525411561.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2af92f4dd7e4e13bc5b5e0257275e3fb/janova.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebbb82877d---girevuzut.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/kitolodunaletufaxifoxofu.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dab92672c---taridixuzud.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/37338640896.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/fawewojixawekapavit.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/kadositarojilazufulaz.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/63df01bea16ccb1e4fdcf4c067fec24c/39775242298.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/13789477409.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bbafce088---galumimixuwidoxenatag.pdfIn PDF document text
    • http://anm-av.de/uploads/files/51789520975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=demons+imagine+dragons+spartito+piano+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/xodevexoru.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_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 10796 bytes
SHA-256: 71c99c5f8510c94099c807a38a85fade197fc481723786a99ccc853e7f4c5ad2
font_01_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 19464 bytes
SHA-256: 5ea2f4944f2e218800e3c4111f123e1829ffb7d6298277d2a82eb0a80954ddd9
font_02_sfnt_off00013e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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