Malicious PDF — malware analysis report

Static analysis result for SHA-256 6702915acf366e8b…

MALICIOUS

PDF

84.0 KB Created: 2021-09-21 09:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2a1eccf4fe905fa2126316d39d6cb4c1 SHA-1: 2449affbf47d3489532f92e03ac765447cfc3bac SHA-256: 6702915acf366e8bc5b7cfa2f096e99336942ba1d5821fa047a777994b814d3d
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install or connect with a remote support tool. Numerous embedded URLs point to potentially compromised or disposable hosting, suggesting a distribution mechanism for further payloads or phishing content. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://cructi.ru/uplcv?utm_term=setup+android+remote+control PDF link annotation
    • http://falcon.dk/sites/default/files/webfm/14069774077.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/93699854165.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/15dab9902c2936ad479327e7c02fbd1c/jemusazikovedoxopober.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c393e6dfeb---12512782290.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/43855120278.pdfIn PDF document text
    • http://wmsone.com/eimages/file/76141571054.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/pural.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/63371617308.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/tidope.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/1736926557.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/jiwavejexuxekutuku.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/30969575222.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/86001827458.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/xutarati.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b42f2ed7fc5a963caaa74ca0f4a41794/pexekapinaxudijelodikufem.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/10164206481.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/70952021042.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/fidemizetubinawatosovav.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/j7dmbf2cmt7i8ajmonu4i42692/venawedepaxipel.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/xuxukarivagi.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/15573812553.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/genavaxitafaga.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_off0000e500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE500 17280 bytes
SHA-256: 9659bc9d38bed0e58da61a26ce0d7394b325a0e8eb1ca4b450a8714e6ec3f64f
font_01_sfnt_off000111f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A08 10684 bytes
SHA-256: 0a9ce8be7eed7fe6c3327fca3a27b6e1f5e0e75bf1b13c8cbda9f88ec271fd4a

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