Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17993d8d44f4037…

MALICIOUS

PDF

83.0 KB Created: 2021-08-23 16:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a4a83e939cdf8bc5c50c13552994dfc SHA-1: 525b40a084d05672eed237b28b7586411e10df09 SHA-256: f17993d8d44f403707b2ea7dcb481c7a021507deb9718068ab169fdf9b725acc
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised upload URLs and a UTM term redirector points to a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=assassins+creed+odyssey+tablets PDF link annotation
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/0dce903734844d1e31db1053b85bc32f/48098290885.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/62663900331.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/cna53otv9oh7d50nufibllr8u2/sufiwututimibexo.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/743e01e5cd0aa37ea9ec07c2cde42bc0/gugifeluratonej.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/wajetelagefozom.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62708cf1d0---91365051644.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/xiruwuwarijawi.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/sogufegom.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a0b7341c61---wekebewutikemokedinoti.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a757d3781ba---wekipafaredev.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210530_3F2D195B09A7B199.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1f1ea71e301cd1379d36292a640c0491/relogi.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b65cf5264d3---dobajipewapeside.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/30250799079.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/tawitodulijojagit.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/83709285291.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/79175945621.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16102d8ed8de1b---kifuwijafazuxodufevoxef.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/rowigitaxifipuwasa.pdfIn PDF document text
    • https://tonitomov.com/picture/file/932499890.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/426795597.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/dodarab.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608577a1d7fab---58548889722.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe4667875e---79534137785.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/mizij.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_off0000e23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23C 16784 bytes
SHA-256: 1ecb99da6497ac3c473c563e917391f6a02e2212f6178e33c955f0e33feeb5ea
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D6 10600 bytes
SHA-256: 9325903dddf6d12ef9bda88efa5c7a824696a0f8c3794500e56b47f2cb026db6

Open this report in the interactive analyzer, or submit your own file for analysis.