Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dacc432fdfa4a98…

MALICIOUS

PDF

117.7 KB Created: 2021-09-05 14:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 423ea18daa21bad40c9092fc9c8ec32b SHA-1: 55bb9c6c1f42cb57d2cfcb9e1fb07852b2795532 SHA-256: 0dacc432fdfa4a982cb63f9f02d65ff855a74d075500fdc426f2f6d059cc9018
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/2328811395.pdf In PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1ae647abd---91559529262.pdfIn PDF document text
    • http://thegioioto.store/upload/files/zemanadavavitavebesaxalo.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/78710327127.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/38926707030.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/87073596142.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/92794231892.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/79015452058.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/noposinasetujinuwumavole.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/18060775787.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3db334f6a5---70469201113.pdfIn PDF document text
    • https://micsys.in/userfiles/file/67060015188.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/tujiwovefokoni.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/84914d9db3510825181ff9dd094ec38b/66529766767.pdfIn PDF document text
    • http://www.polni.si/Images/files/wazofalupojisovad.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/l6ktkd8mi5buogjg6acrk939r2/56232482768.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/teromofagefulewad.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/90441105790.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/42496782517.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca396cfc70---zimoperu.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160de57ff1d23c---wezogejelevo.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/tefasebis.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/vopojixipejeverifejo.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/6d558021f2c0a757893a0f95ed0f7296/kumulopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=kuka+robot+programming+manual+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_off0001637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637B 10864 bytes
SHA-256: ccf861cb3bafac0cfe1f58e35493e61b37c2b6e9053a7f51c065860a30e7fad3
font_01_sfnt_off00017c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C12 19928 bytes
SHA-256: d4bc795184cdbeb2b60ec9dc03dc88693fdf1ac44f433c773f4ad6527f03c22a
font_02_sfnt_off0001b021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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