Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78979795e3683a9…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 01:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eaa4ed0ff62fe35aa814e3ca583fe772 SHA-1: a11d468461e112d80e633d0399bb3e51c4b33e03 SHA-256: a78979795e3683a9ecc89ba56353242d9af9667e7db681a8d80c111c87823d78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farm heuristics indicates an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=stock+valuation+formula+pdf PDF link annotation
    • http://mdbim.pl/ubezpiecz/obrazy/file/vovipebenazesenozolewal.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608918381eb42---xatafalemaloweve.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b430adbe44---tilegetozutopi.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/ruwakadakafuf.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fojotafekorabadovegodejuk.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/610a4501e316c9eddf7c4fa0fd00e3dc/75273909400.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/18092090375.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/mefajirakasine.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/binarumadanob.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/temolevotape.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202108260638092335.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/79787549468.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/240104238946.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4490ace9ba---vujefop.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/wipulaj.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607978f8449be---5204104343.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/gorebutujafezopetugev.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/5ct1o59kk15i4i2oapo4ktju1d/39402250758.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/20764519958.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/je6dtu3saki81j8jjf4ekoepe5/begif.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/wedetejuvemofikokevisixug.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/53775011494.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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 10816 bytes
SHA-256: f4c6d9124d561538ad86c94a911adad43bad6f5f1ba421ca4df9260a2a1b5b8f
font_02_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 18148 bytes
SHA-256: ffe2679cfc1334ed1c40252f303a02e6d70e2bc57f6d00f6dc80ba3576a06196

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