Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b19ad047ed2564…

MALICIOUS

PDF

100.3 KB Created: 2021-06-26 10:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9fa44e4ace993b59218e31d30f797f2 SHA-1: 86c4422c41d2a95e187ba69dcf701004fb1b1d28 SHA-256: 24b19ad047ed2564f3b2ccda4ed17247cc4c9ad2aa62923f98944cc8f9817f06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised CMS platforms or disposable domains. This pattern is commonly used for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://nedirajtebosnu.net/userfiles/file/17260965524.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b026b4a288---21268422273.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/ee88e07966547a52f1533823df86e958/zafukeriv.pdf
    • http://ttccid.com/userfiles/file/71799432141.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/bb6441567f99d35338ba182e7cec5105/gutopejesafilosameniv.pdf
    • http://nature-revive.org/files/file/66244277406.pdf
    • http://ahcxdq.com/uploads/file/301851367999.pdf
    • http://alexlunacoach.com/img/editor/file/pasunivavazal.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/38d2ede83109017d0fe5689cd98c2b68/87647843564.pdf
    • http://nesthomes.in/userfiles/file/wevidopel.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/lkmojls3qjarhrspbd1tterjl3/faromewodugi.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d3326755b---nufivivatezirawulaluvajab.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806e0b832b7---vutola.pdf
    • https://winpoasia.com/ckfinder/userfiles/files/2079612632.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a31d5ef3---kalizerab.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3b2987e46---menemapesebagikijonolenir.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/lrc9cmh3rspbqj5dg9tp6b2ff6/bamudigubapiwe.pdf
    • https://paperland.bg/uploads/file/32583631090.pdf
    • http://thegioituigiay.net/uploads/files/nefikije.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/l7s2sf8n130pavembakn2qllaq/74032225894.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dobdcpdtscjqmbed73e8667q57/10141473788.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/39f8d4036ffaa9e41e5838a49240c8b3/nebowekuzu.pdf
    • http://drjoecarver.com/clients/49355/File/tejuvupuseburebeforo.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f0c5d4e---10559579889.pdf
    • http://danguykhoidoanhnghiephp.vn/Upload/files/volewijeno.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+devil%27s+rejects
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126cf.bin
7ba7b13d224bb40063f7c318b0af99e320a518d0e5e8ef4e5ae4e240e38cc28a
pdf-font-stream PDF embedded font (sfnt) at offset 0x126CF 16924 bytes
font_01_sfnt_off00015300.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15300 16792 bytes
font_02_sfnt_off00016b17.bin
54b3f429477743910bbdb548e104f55ce0528508d5c83ae950a2c4d30ca4d1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x16B17 10272 bytes