Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0e9558d32323b0…

MALICIOUS

PDF

95.0 KB Created: 2021-06-27 11:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 924482e0d12204beafc8a3decfdcbf86 SHA-1: eed5d24ce8550abf1ba00d2b13d92f2eba451662 SHA-256: 8a0e9558d32323b010752153e8dc7370e403ff69f8f0d2d53afefde11682d909
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous links to potentially compromised websites, suggesting a link farm designed to lead users to malicious content. The presence of a security bypass instruction further indicates malicious intent, likely to facilitate a phishing attack or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886b544db02---ligurib.pdf In PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a80754ede---8389746056.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/7062995317.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/kaposirajuwas.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ef4d1f33add9226acfda7c1b8bc62dac/fakosilatoneka.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jasunovagaved.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/soganomoridisuluvakugekew.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608080d8cbe3b---jusuxinilakefebuzajifal.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2m2kbapupa5qbuevv92do1d710/14704888845.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/kejazepowajogi.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/oogutekktcec2onsjn6at084u3/13175365962.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a7493c676---20017018233.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a5d255c72---tiguviwanapoxitawopiz.pdfIn PDF document text
    • http://poorclarescork.ie/images/93154038061.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/9c95b3ba9d2c01cb897b9f421f9ad974/zozaniwutojuterofegag.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/vapuzatoki.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a211890f5ca---33240548519.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/zuxejemevalubad.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a178b76b0f9---21897802629.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/1le9vb2h5704ha649fmsceqjhp/62137133876.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff43814ee2---89401195942.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/dofajobu.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096e56088b4c---55107780381.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/46209079387.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608715229f8a0---4459280728.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/karuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=case+2+animatronics+survival+download+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 16120 bytes
SHA-256: 5cfa37fce0989fcd98349beccf9a63719aff29e66b00f3ba655f54b68a91f5d5
font_01_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 18200 bytes
SHA-256: e9116d861a870fcd931ff49c3fa1bef2ec936e0a72a438295245d446456d288f
font_02_sfnt_off00013c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15426 10932 bytes
SHA-256: 6de811ceb8f81fb9402cc5c0990cd80df540f794e5b4baea28a26514ebe1b715

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