Malicious PDF — malware analysis report

Static analysis result for SHA-256 063fc2548922efec…

MALICIOUS

PDF

80.3 KB Created: 2021-08-15 14:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 267f9c2dc10ad7930b4b8943d89694b5 SHA-1: ee034f36edcb819c59fef0d3e2ec6e8dd9d0f352 SHA-256: 063fc2548922efec3613221227e3a01a4b2e983d20ce5b5426317d8c73c41cee
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting sites. These elements suggest the PDF is designed to redirect users to malicious destinations, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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://anna-bel.com/app/webroot/files/userfiles/files/bazuwewoxavobeterolore.pdf In PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83fa80c48---lezofefatab.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/15451482095.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3c13eaaeb---3491909380.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/16804604202.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/geludovajazamo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a5847074e---87005461450.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad06e62018c---jusodebogukatadinul.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d687d859a7---9379941566.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ccdd2c01f46c111ee405191cab378017/fesasefufuwumaweluwexezuk.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c48426abd---96371986382.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6eeadd91d0ba6292a9c6a1577644c2f9/51481874389.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/35157654341.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607878b4ec53d---43631632245.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e290f8d40e1b1494e78fd91a2e36e61b/49899045968.pdfIn PDF document text
    • https://orrizon.ru/images/file/37078809665.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/090132417070.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/95740881578.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/70927232254.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/49784421672.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/9347776830.pdfIn PDF document text
    • http://belloverde.net/emailer/file/xupijadoxusonazunimol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=can+i+make+a+scarf+on+a+round+loomPDF 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_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 16860 bytes
SHA-256: f954bcba55985d5d8a1ed66a2e9165269105c7044b7eb521519929ac2d4c3ebd
font_01_sfnt_off00010337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10337 10760 bytes
SHA-256: d9e548784633257140618e8e52681ec804991e2d91a359458ea06f6e834f58a0
font_02_sfnt_off00011be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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