Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea91983161fb74a5…

MALICIOUS

PDF

85.8 KB Created: 2021-06-27 03:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 578ff2b86e13e363ad6331cd56590d55 SHA-1: de1e62195d604c7d0be0e74e5b9a2cfd3b6027dc SHA-256: ea91983161fb74a5bb0681ba1db1329c4dea82d12f7a135edcbcd96d88226d5e
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous compromised WordPress upload storage locations and disposable hosting sites. The primary goal appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://asdgolfclubtoscana.com/writable/public/userfiles/file/loluto.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7a7763ce50d6f764097bc1953b472868/mideruluxidakokorures.pdf
    • http://akicgiyim.com/userfiles/file/40618961685.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/qs4he3umfd339tmnue1frrpur2/67990887967.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607877373b5e7---tilutilufem.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/4eeadf3c087f8350821ef4c032cc2cf4/tunuzajiliri.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099270bb5d3f---2176471619.pdf
    • http://cpgny.com/userfiles/files/rasuwomewosuzizokepi.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fa34199f4---jupog.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/ponuzovilonela.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb0290ef3---dufopowemetawow.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c523d58a8---27230684972.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce18df1992---52427417517.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a662f51faff---86794921113.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/517528f33c19417edebff003f6bc3c0a/wifonufulow.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/d6b44hl51rle3htb2ldlutd41h/93385038923.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/rupexuxesozezevowaz.pdf
    • https://airflow-skateboards.com/upload/file/28234191486.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/d0fda38773382b1567a251487c80be20/21447100446.pdf
    • https://panama4d.com/contents//files/fowobawolegox.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af576d83a---niralidupom.pdf
    • https://tolgyesvolgy.hu/userfiles/file/1051816985.pdf
    • http://www.anclupnapoli.it/userfiles/file/bilonotibezu.pdf
    • https://contabil-fiscal.ro/mm/file/36861167430.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbd56970dc---kisunudiwasukodagivul.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=virtue+ethics+business+definition
    • 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_off0000eed3.bin
4b5c93a86aee7e60fc67ca8cbabd4d91068cc8e3c9d3542b651e973f66de9834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 16544 bytes
font_01_sfnt_off0001198b.bin
aaca02b549d63a0c4ef1ca00386c16dad57670d65345a3f3159c62a3c617ec43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1198B 10576 bytes
font_02_sfnt_off000131ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131AC 16792 bytes

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