Malicious PDF — malware analysis report

Static analysis result for SHA-256 694042712e0652af…

MALICIOUS

PDF

109.9 KB Created: 2021-09-08 06:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 66be5e139aa878c7d9b1aaa0b9693083 SHA-1: 6ad6753660db61821ff45b5ee2baa332f1b51861 SHA-256: 694042712e0652af74a98c2632a829c53ae6a78b2d4f743a1e58b3ed4fc07ae4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to phishing or malware distribution sites. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=bogota+turismo+pdf PDF link annotation
    • http://pomocnaukowa.net/Upload/file/mudokupefuwafuturej.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cad95729e---jalebokedazutez.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b71ef490352---35556136426.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/xibewu.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/26770318238.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/15cca3cf31235b734c7dd8335679f53c/83032379951.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/jakukix.pdfIn PDF document text
    • http://dgjst.com/upfile/file/51782663768.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb033316e4---tizotanuluxutejumawe.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/4ef24923f1bb5773bd081e9a185d5cce/toluxokileluzeminikakono.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/8651819726.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e05f66dda19---nasowuvaxotovokogebi.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160962873053c0---kokegulevuwolem.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cbc195dab---doteruwukawokunuzajuzez.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/15b15227fc9d301be10f223ddfa8365c/rugimitiretosi.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/95997616975.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9258aaf0---69435574997.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8399675c4---73840779386.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da1c711927---nidijozelasivapise.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-24/20210624192438795964.pdfIn PDF document text
    • https://proia.bg/userfiles/file/milafonedaxuxagifef.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/69213932849.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ecdc6c4e---82346482003.pdfIn PDF document text
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/18967272493.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_off000146db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DB 10712 bytes
SHA-256: 9a4fcadd35bfbcb50d491eea292513abd664186be56f6fe1473c2a028a5fd306
font_01_sfnt_off00015f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17769 19808 bytes
SHA-256: a3b20d98c934085e08f77ddad0bc88d0e499709a02d48a9106c49e07b8da40e8

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