Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3188b08ebe438cd…

MALICIOUS

PDF

83.2 KB Created: 2021-06-27 23:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 316852bd6ef3638f1a117c524fc27ae6 SHA-1: a71fbc648e0a46b98ae5708943a525b0a3022fdf SHA-256: d3188b08ebe438cd0c8ee676db7c18b0f8ee2e28ed6b492b5f5925621b695e07
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to potentially malicious content. The presence of multiple links pointing to compromised WordPress sites and disposable hosting suggests an attempt to obscure the true destination. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document may also instruct users to install remote support tools, a common tactic for gaining unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://coretry.ru/uplcv?utm_term=unlimited+spider+man+game+download
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3276a53650---79068360064.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/99493405252.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbc6d78e3---wiramigenezisaluj.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8adb4543c---79794925363.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e1529dce---xizipitedanekesowe.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd7467efb---81379167183.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/68a370ba19772403413143012451f466/12105581047.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/85db1a4a2d28cf6e81e20d843bac4354/87755905446.pdf
    • http://aire-limpio.com/img/editor/file/43518985024.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/prg1etn41pinb3h96hdgfsgpm6/pulaliwesumar.pdf
    • http://mp-journal.com/media/file/rufonilavadux.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/cf8lap77krorme5lmbk69afne7/9167971032.pdf
    • http://matchonusa.com/uploads/files/rokulodusabizibovozizeze.pdf
    • https://foodphotoshop.com/userfiles/files/81690095718.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/2f72760755fd4ae8abe7c87a2b67f8b2/17158858017.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/7bce26a0dd976f2d013003f7cd91304c/dopitopa.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964df7e5b4c---bevutepuzepobulabetulapu.pdf
    • http://dchs1961.com/clients/871949/File/94757698907.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/a9fb117bpk09hv34eko8943dau/31300473119.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090ddb8a6a6d---pewimanaxofuses.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce92ed354fc---77773844757.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/4sst3gaso70seo6vnd7nku8bk4/bujomenatirufatut.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cd2b5524e03f4329c58f1ac46d922e0a/16575425087.pdf
    • 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_off0000e0ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 16792 bytes
font_01_sfnt_off0000f8e1.bin
cb67aa09d6ed3efff54351c76c5a8366a43dee8c4c9e38a3a18c7a759e0b252f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 10828 bytes
font_02_sfnt_off000111a0.bin
525f556be031c0c1ac3fdf5fc0b37a577f92453e874d8be44f57359fc892a028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 17548 bytes

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