Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05e6d96042fc50a…

MALICIOUS

PDF

99.6 KB Created: 2021-08-27 01:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 37df2194f8171c54e70be57c826d5b1e SHA-1: 00c72275c49af82516fd2fc778e7d4e85dddf833 SHA-256: e05e6d96042fc50ae986dcce176ebcd85259c94c0049b7d10f6c2b36e7cf93db
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates a likely initial access vector via spearphishing attachment, leading to exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b3b7458462b94dfe12e4f24cea59dba9/bavapiduba.pdf In PDF document text
    • http://diysmart.net/userfiles/file/xajilizijige.pdfIn PDF document text
    • http://savannahcentury.info/clients/4/44/449a5b3489ef279447e90cf6cdd72f1c/File/fobelujezemapefudazesufo.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/52980824719.pdfIn PDF document text
    • https://soechi.com/userfiles/file/33770474086.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/e19a749c6123e1d228e8df31241ff214/43629263618.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c901683de51---xapinadivofilapejibepap.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6073ef1db475ef165c75d8c71b808b24/22077600210.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7853312477.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/fevemarexenukazepafikibum.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/26555539901.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/aot6dkt83js2shcj3lgeedin7q/91895616885.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae80032570---lopovumewan.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/73486037070.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608797c0beea0---wifejulafe.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b029a59a2ea316c723688fdb5b91dfbf/nevejudunupaterixisediwul.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/9af7b93bbbe25e0497abe32b603a701a/25170274258.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610ebc784d006---83717769286.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/78202465859.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcece297a3---togaxewivemurago.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/vaxifeju.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/berezo.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/96539960711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=inflammation+of+the+parotid+salivary+glandsPDF 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_off00011afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFC 20120 bytes
SHA-256: f7a5ed859d3c23d4daddf69eeb7854eae31937da66a12d6d2ba952565e88f8d7
font_01_sfnt_off00014f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16740 11076 bytes
SHA-256: b866654fe80c992984031d849093f2803ba56ed1bf07fbec9259e00cc947a321

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