Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8daeb2017ac6b2d…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 18:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af1b25bfb6ec277dcc4abe535ed216a0 SHA-1: 92b06a249c1790e5a003667459acaf92ad827454 SHA-256: f8daeb2017ac6b2dee646b4a581b814099453a5757a59c824768e11b9e3e2741
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of numerous links on potentially compromised CMS upload storage suggests an effort to distribute malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://abacusnancy.com/userfiles/file/wexetopixoginoxebuwifiru.pdf
    • http://ingenermarket.ru/userfiles/17928268985.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160871d3015148---44792637789.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/fea1fc8e78f64f2d74ed7e86cae973d0/vapofosadorapofonasaje.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3e417cc4191417b653c649c6c74d755e/jadiwaxogotosa.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/81316784739.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d97ee522d2---gomavezi.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49caccda2---kojigowifubutalibexupil.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/34e2d943c1f62e9240a174d81039cb37/xamosanemakad.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/flr6po03bff8vbp6t22n6cle30/kurosubatidami.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/77nbkmgg9b3ujq7ojvgto33mug/40350010892.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a828b8c785---puzegujuwexixudirerof.pdf
    • https://arvikabc.com/images/uploadedimages/file/faxaxigefitugegowuzaxowu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6ca7fe2179a6f67ce4becea6bd6445cd/kimuvaxizuxesufafowuxo.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/ee6d041c32e7d186aee880eb1ae302a7/fugefufepo.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2de4776ff---29006835949.pdf
    • http://koreaseowon.com/ckupload/files/viziwotilafafisopopoxax.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3f4e498d4b7cd676cada2f51692119a0/27319457056.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/bb89mo54o3ovviesd7vef5slt1/mekugofobamug.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/cmv345hpvff5uqv5jt3f4ul7gc/84135674412.pdf
    • http://domholidays.com/userfiles/file/kigezutivijivawuz.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/1ad809879e48a6c8d2be8f4215fee5a0/xejabulopozul.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f7849ae3d9a021133abd6a06f49e9915/dikixanexolebutowolini.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd623a387a1---21935699750.pdf
    • http://3suntech.com/UploadFile/file/20210608040722385.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=steam+unblocked+download+at+school
    • 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_off0000f5bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 16792 bytes
font_01_sfnt_off00010dd4.bin
c1bda011967a54185a65197996deecad216ab2cb0b8eb03c1c8532fa07673389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 10936 bytes
font_02_sfnt_off0001270c.bin
f13de49ddb9a7e5ea5b006261b7408fe8201898fc958d5f5223729af8441318f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 16788 bytes

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