Malicious PDF — malware analysis report

Static analysis result for SHA-256 6768283eb1d95591…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 09:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 40cf2545847dcfc3da168726a8655ba1 SHA-1: 774f74e5abe602da4dd025c35661ed461820b2ac SHA-256: 6768283eb1d95591d7b06d069d68f61dfdce17a8d40c177315d874a84f2b2275
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded JavaScript stream and numerous external URIs, forming a link farm. These links point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites for phishing or malware delivery. The presence of JavaScript indicates potential for further exploitation beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://huntic.ru/uplcv?utm_term=developing+for+ios+vs+android PDF link annotation
    • http://videocycling.info/files/file/bazogun.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/jalowuguvigotumizo.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/f5f6f3f4e499a43acd24636590769a46/mevazaxekowepegar.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/paxilujimupeguzup.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/59018559437.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd6d45c73d---45522656772.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/98439536569.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/radozid.pdfIn PDF document text
    • https://ambalatender.com/upload/files/zopubokisop.pdfIn PDF document text
    • http://kim-clark.ru/files/file/74503286429.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/48c8fa5aa333a14dee4d2ce7b416e38f/34371557605.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/jininox.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/89778770788.pdfIn PDF document text
    • http://telektrans.hu/editor_up/63205115750.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/8548290046.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/52719083306.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/27055808751.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/kawiwazeguviw.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/xivafekinajidazapuligoki.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396bfbdce77---78263099277.pdfIn PDF document text
    • https://aashianarealty.com/file/76455385486.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/tuwiwavu.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/puratukosiva.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_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 17356 bytes
SHA-256: d8d696f7fa2792cea4a0c32ca38f57e6669abc18350d423ad2a58fda0c4eec5b
font_02_sfnt_off00011d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D56 10644 bytes
SHA-256: 6e6f3c57a58114f8f973e809fef638a314246126f37b53a87b49d00b7e67e85b

Open this report in the interactive analyzer, or submit your own file for analysis.