Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0740298cc3e792…

MALICIOUS

PDF

98.9 KB Created: 2021-09-02 23:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 700c6ac108e41d71dd98b48494d71391 SHA-1: 86bc3aecf55171ccdecca15ae0989b4ac5e71954 SHA-256: bd0740298cc3e792366d7655bd3b7de9d92ce106e9651e2ddecb2408ebb83a9f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or are part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and does not provide direct clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sushrutproctology.org/ckfinder/userfiles/files/86521377925.pdf In PDF document text
    • http://orem.mn/uploads/files/43576298253.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af999717a2a---39437514075.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/nufireguwanid.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/1348967310.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/bijunoli.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070a006c0d65---satupapala.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/tuzexagexat.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/fikitapizurenikujubinokav.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/josubak.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/14964191495.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2fede1c84---25132874892.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/84154fa114420d7655d9fd09edad6b21/tokixaredegatovox.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/vipugowujavu.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/17940361676.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/bopumute.pdfIn PDF document text
    • http://cauthinh.com/luutru/files/woribolepigisekesokidiz.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/57774866133.pdfIn PDF document text
    • http://madison62alumni.com/clients/e/e8/e84cd6a5166dbe8c5f6852bff763f4b2/File/toziwewowadaka.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/tatejojot.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/3bd407e0d6967aafd5411cd7c323db04/76565690247.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b58c0bbb403b0fedc83dda9b6ca1ec30/68948671277.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b9f6ea12178adec0ec9c900b49312e75/wikerokemixesoxow.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81122282483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=olmesartan+vs+telmisartan+pdfPDF 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_off00011b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 10632 bytes
SHA-256: 1a92e0616cb02820592b01a1811f9edcc02db4e1f03eadd5fc3aabb2ae3368ad
font_01_sfnt_off00013384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 19720 bytes
SHA-256: ea33ea3b3fa2e4c58a782b1419db00832fb31a52e61f151c5abd9508ac03b2c4
font_02_sfnt_off00016627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16627 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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