Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e797872919f929…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 21:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 60633a37d6291d568dd55723114f6455 SHA-1: 3d1a7b49260f7677df8c6ff2a1e641cd3d98a309 SHA-256: c9e797872919f929fdbce57584d148316c45af6024df84da571e5e32433834e9
204 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or disposable hosting. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line interface, a common tactic for executing downloaded payloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://philabc.ru/uplcv?utm_term=ios+app+library+for+android PDF link annotation
    • https://olgunbey.com/upload/ckfinder/files/67377345653.pdfIn PDF document text
    • http://deltools.com/userfiles/file/bitojosadapo.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/vanirukavukikidirazivowo.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/koredexemepopuwat.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/79054104007.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/lexajepevibuv.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/1602382617.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/54856212873.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/sirugugenaxojopajol.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/tevapotolivud.pdfIn PDF document text
    • http://ore-processing.ru/d/files/81170185335.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/nafezojesiporef.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/82424985695.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pq89dspfjfb5shr3j9mupgbfe3/26012434944.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af636ca97d---32453392290.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/53122875346.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/83401749090.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/80892895690.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307a5ec34dc---69496671092.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/97044244818.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/zodefifegitipipi.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16138f112bcbd7---67977548331.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/bepijugetunagemokimexele.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/22086819322.pdfIn PDF document text
    • 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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 10464 bytes
SHA-256: 8bc7dcfe5886326cd2cf22b5df5a9c1f0568b5e786d2af4df67a2ff5efa6a735
font_01_sfnt_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 17292 bytes
SHA-256: 8b4413325b6c48e3689605cbe93c34fe80adb2dddaf91675acd32a2af484ed0d
font_02_sfnt_off00011c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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