Malicious PDF — malware analysis report

Static analysis result for SHA-256 2006e8b9779042d0…

MALICIOUS

PDF

87.4 KB Created: 2021-07-05 15:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dc29f8107131bc5bd3b90d2ee8ca94fa SHA-1: 8123dceff70615c15da3de05e5a2ca89e7c7eca1 SHA-256: 2006e8b9779042d0ccd51124e9934f2b386cf3fcac0957427c50c761447f3723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are typical of PDF-based redirection lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://pistant.ru/uplcv?utm_term=one+mile+track+near+me PDF link annotation
    • http://cnp-inc.com/ckupload/files/99790350362.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/29027374813.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b323e8cdb03---23422142503.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0a5b999e---35315595236.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/nezipoka.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c603e963ade---59247259171.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/59d2e66a4d876e423fea306e9ebbaf13/70899894509.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/vojiponasawusebijuvel.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/17e769b94e85b26dfcb8e7fe44f89515/jamini.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be511e39a64---riwipuzufezefudebirimabe.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb35a4d2f1---tuponosuwor.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704fdf91442---zofonuxa.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/06u7hr6nbc3ui2emgpsafppcl9/mazatazelusotumoxisugeg.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/8512170930.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/173e5cb2ca0fce21a064165088c6a6ad/kupidafugutizegudiretir.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/xorigufujulaxe.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/27586674601.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5f50c250ad24efc7e8f1269aee862748/46345408598.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/77250300877.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/45099262504.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/fupiwivawesorivokigel.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a90e43e43d36b7c5a5f3186ed46fc2e7/xufizelile.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/fexav.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021062817413585.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/ninatediz.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb94c443148---nulasoxajenaxokof.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_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 10220 bytes
SHA-256: 36ea86870bc1c762dacc4f0267d18a72f5644cea24ba18d626cf3200d77803f1
font_01_sfnt_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 17248 bytes
SHA-256: 94428296f5056297b05021d99750d8bbb5e3e2c34a015b12887b61c6cb37293f

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