Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc8b0ad138cff0b…

MALICIOUS

PDF

74.5 KB Created: 2021-08-21 05:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5966da2cb83b9587e7da5b0b49063010 SHA-1: 2f14195ba28853ef397fdf2c27f523cc136a1b00 SHA-256: 5dc8b0ad138cff0bdfb69ca3eae4fa2f4bc9ccddea6913f08af6a4b75b04fd90
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and the use of disposable hosting indicate a coordinated effort to obscure the ultimate destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4575691525---29809788809.pdf In PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161203e47ed936---tidojunesumajuw.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/97f0cbe9bf88e5dad1f532dd751f8571/dowup.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/tineteradokovo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d7cfc8262---22776991541.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f5e3d8184e394a02972b009ae3ef6223/33261687151.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac619b885---kuxaxozizapovujo.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/672349603.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/30bbdttvpob3honu2428pugup9/65748799017.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/kifimedefijerexo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acb87dbeebf---94935073542.pdfIn PDF document text
    • http://3will.org/soubory/files/jedameleburinuparem.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/25722337702.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/sesakuvezavilaseguden.pdfIn PDF document text
    • http://salkim.com/userfiles/file/fubabifafivemi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0167d40cc---21141716369.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/2269571192.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/ninexik.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/3886f23029069b3381512af5dc33d19b/12977728445.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/35778360137.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/300a514804b589c728bc0ac13a283545/99124875027.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/6361516871.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9626d817b2791b34fb2e6661e08ff126/79202174796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=rendirse+jamas+3+online+latino+pelisplusPDF 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_off0000bd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9D 17016 bytes
SHA-256: 17d150c9304173c4dac6119bdb91562a781bf933c777981f1f319c1f3d879295
font_01_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 11000 bytes
SHA-256: 94cb1aa2e506acb6cd160a7a593d271cdffe1ffbc6cc4c66a959753cfaec399b

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