Malicious PDF — malware analysis report

Static analysis result for SHA-256 05726ff989a29294…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 11:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0d9ee805969a316fbcb299ab97cf9b4a SHA-1: b58d63e8c971c0b87e181f0a80736606afbc3c06 SHA-256: 05726ff989a292949247489ddec660ed9cbafd49456e4687eb36786d8c5bfe12
204 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or download additional payloads. Heuristics indicate it's a phishing lure related to remote support tools, a common tactic for gaining unauthorized access. The presence of multiple links to potentially compromised websites further supports a malicious intent to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c4b2389e2ef95c0cdd62e00eaa736bb2/getarejobemubovemej.pdf In PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/burezobo.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/62521437750.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/pukanidiladenodaruvewe.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/xires.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/32786085922.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/fimul.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/wafuwav.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/64857907355.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109082038567957.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/m00lhjdo063hk0p52fnags2h1u/fipidalo.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/52028537210.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/dejitixoni.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/30539129438.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/gesalaresujipuwof.pdfIn PDF document text
    • http://kbchina.de/upload/23729084866.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/51871874465.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143e7a552047---79567470207.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/lapajabipilewuwopozo.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614168895bf18---bapofijopibejupune.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/beripiveja.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/danume.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/64420185226.pdfIn PDF document text
    • http://guitarenko.fr/img/files/nofofelevugenojewidudovij.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/tanatuwedukojivusumis.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/91386334902.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/11093580219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=screen+mirroring+from+android+to+ipadPDF 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_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 10824 bytes
SHA-256: de054e1e62396e2068c56228370e5c57fc1b56cfeee2aade34ae00dd2df29987
font_01_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 18392 bytes
SHA-256: 8b8b6e27cd5e3de379fe897cdef2b2996b250484021e6da95fef3e88a9e1a817