Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3725ef5b061676…

MALICIOUS

PDF

90.4 KB Created: 2021-06-25 22:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 839ad3c255e5ae30d5e00a4e48b0b17b SHA-1: ad0d811a44b7ea5ea83d87947e0f0b908ef7fdf3 SHA-256: 0e3725ef5b0616763ec15a862194d5ad311219f3ea7ee7cd39be28c038ec7fe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

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://allytemp.ru/uplcv?utm_term=mathematical+literacy+caps+document
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16077e88a18692---46713569751.pdf
    • http://haisushitogo.com/uploads/files/49779405837.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/63ja7adfg8kp39et3u16hefm6r/88651343685.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b45d2679823---fufabotanisarav.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/26c09ce143665065a189dc39a934c27a/61973927378.pdf
    • http://elsekmont.eu/userfiles/file/turetutupibopaxiwoxuremak.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba7bac394f---28522069110.pdf
    • http://rzn-house.ru/upload/file/dorilemulojasawig.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8c3c70414cc82d0dc3fc39fcac9cbdde/tuxomol.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777984ab46---nitoso.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/3894240c7856130fb5a94a0c834bb651/kafixaxuwara.pdf
    • http://zonazero.es/userfiles/file/lodetimitodivox.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/35769c7bf42c79193152cc3378696a09/49324545012.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5200d531d---98629352911.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/02983cb429d3fddee350fc6e1dbf6311/gapedu.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609841cc4d7eb---pivug.pdf
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/81007156602.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/85dccd103598dd94d728d49c9a38040f/lozobemapavikapiluvi.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/65cb6ac7d0af6a832908395e073100c2/zosebe.pdf
    • http://frezerovka.by/images/fxeditor/file/pozotakowemonedifozomemol.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c510902293---manuvebisononekekilekut.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/88971419561.pdf
    • http://gourmethousemacau.com/UploadFilesfile///41330328451.pdf
    • 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_off0000f8f3.bin
24e06dde0748f9c675055eea0096141820732592ed0fe86b1da1259d1373ece8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 10984 bytes
font_01_sfnt_off0001124d.bin
fe8fa7c5f245d6664333acab3e08518ef64c7771a93a61745391ef7f219cbb14
pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 18944 bytes
font_02_sfnt_off00014416.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14416 16792 bytes