Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1f193b9a473e00…

MALICIOUS

PDF

76.1 KB Created: 2021-09-09 07:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2d87822585ce9250b26e25d457aeaafb SHA-1: 1bbeaf51384108cb1695119212ab75b5edee9dff SHA-256: 2f1f193b9a473e009e32334e151efdc3f40c04480a1db952cb672ecae866486c
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and the ClamAV signature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://pixomot.ru/uplcv?utm_term=swipe+to+show+delete+button+android+recyclerview PDF link annotation
    • http://miwon.com.vn/app/webroot/uploads/files/4804897792.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/wepamedifubepa.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/fedatebuzow.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/94637637187.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74062464433.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/51186903272.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/defuvaduweju.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/befiwilozizixosamagunupup.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/68679561980.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/91527744886.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/vixanupukimamag.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0f0451d5cb58592290f8e6cdbee9b87c/7491567608.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/21574926525.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362cf254df3---xerawetefuravi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139109d171ed---82728821730.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/sogasaxu.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/lejon.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/babopovakaper.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/redarawuzalazive.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/jopafugazuniganogera.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/forajosobazunasuzorofuwu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/9mhauh36bdeo2qbeighd6b3ibo/77127819427.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/32062393146.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/25515470bbae1427bb4cfc1a9737510c/3904929551.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vivosabasipaxanitopodosal.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 11192 bytes
SHA-256: dfe1f968142be9d7b1fe09eac24ae7031d7e8f28a7c58d818b49a2922681f3fd
font_01_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1