Malicious PDF — malware analysis report

Static analysis result for SHA-256 003889e6d6004c5e…

MALICIOUS

PDF

96.0 KB Created: 2021-09-05 19:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9c8fa211943b25f8b136a4373127a408 SHA-1: dcec90d6280e2a0df986e08764f3c9513a6a5be4 SHA-256: 003889e6d6004c5e98534457506501a2e323302970f43dcac1bc058320217fe8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • 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://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1cb4f31be---83047795917.pdf In PDF document text
    • http://ikuma-car.com/js/upload/files/42488952219.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e43c3219f4073bb89bce51c00cb4c80d/metamawaremomivik.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/36146015505.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jibolirezevuzabexewotike.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dc0b6aa2b---86978494422.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/61067864816.pdfIn PDF document text
    • https://businesslife.com/content/files/wumirowajatafimen.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/46229150678.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/87012321211.pdfIn PDF document text
    • https://zhansq.cn/upload/file/naxegasazewaxalu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bccb07c19---36096839645.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210701221229.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce85fed143---42668186467.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/lavepojew.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/redenoleduguji.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a170850d73a---3342042030.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/tedewexezekiwunug.pdfIn PDF document text
    • https://lazerom.pro/media/file/76857054307.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a41827d51---95125655752.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/41710549857.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/20488325611.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/jc8b0qmavmojmihtuka4v17m92/2152477705.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79075856743.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/25958404412.pdfIn PDF document text
    • https://basisnomor.com/contents//files/44049400747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=probabilidad+condicional+e+independencia+ejercicios+resueltos+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_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12272 10984 bytes
SHA-256: 3a744a76a1ce2616485b8a410bd384e6762dfc9b90f59ea4c48dc2ceca86bfeb
font_02_sfnt_off00013bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC5 20960 bytes
SHA-256: e524a7fb1b16d00a4ebc1a1f77c9c09c78bfc05f54b4fa5a40d6a43e93f8ad41

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