Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d7028f150fa65f…

MALICIOUS

PDF

84.4 KB Created: 2021-07-27 04:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a8a7f1f35e0021aa4d309084f7b9dd03 SHA-1: 7d32023c1397005a3af196a18639edf294652be5 SHA-256: b3d7028f150fa65f1d6d04c004fe3b9dcb3bf934b5a0773d56dc1de7e55dd51d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous links, many pointing to PDFs hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content. While no scripts were directly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075325061fb7---damobupiwoduxu.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/7999546ac7f79cbc922fab36d44a06d8/kefok.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55e95a18e0---kukajilemozubapuwif.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/98545041737.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607628737a831---69866142536.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/31037024007.pdfIn PDF document text
    • https://micsys.in/userfiles/file/zajufekid.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/cc3661277e9e49c51b8ff0a2d6ec59c0/rixifa.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/2196bfe1e47f746d31476b16ad0ce442/56486114250.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f60dc15a38---leworolexugomato.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/21169156820.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ba9e4eb42---rafalamenaduvusulisawow.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093b3d7a98dc---nusamosivop.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e68ad8e5e---vanowurejusazezodi.pdfIn PDF document text
    • https://t2sc.me/userfiles/96318666414.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/76266529810.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/12082549659.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c56ccd93ea---puwuvebiwewaderakebob.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb32869a74---81672725444.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/qum9aahftpj44rbc2ooq8r927c/pagujobege.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ed6eea291---digip.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/lipabofunagikifebida.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/68520252966.pdfIn PDF document text
    • https://asiahijau.com/contents//files/wupavinuronu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=percy+jackson+and+the+olympians+full+movie+in+hindi+dubbed+khatrimazaPDF 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_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 17700 bytes
SHA-256: 8602bbbf39eae73880c095df940706ec593e2e2f4e02a7c23d15077d1e0ff9ec
font_01_sfnt_off00011030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 11588 bytes
SHA-256: c2dd0ae5fab2a55396144691f36eb9322573f26823847b1582e52f0e2e991833

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