Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3adfb676163c322…

MALICIOUS

PDF

105.4 KB Created: 2021-07-26 10:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cafe425b2c6387a8f383333e22543109 SHA-1: 83722be9b63573d9154145ba4cd1e24c56331601 SHA-256: c3adfb676163c32296cec6cbdc729f9ed1fc6a48b3430697767c3756c5da3f19
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection indicates this is a known phishing or trojan PDF. While no scripts were explicitly extracted, the structure suggests it functions as a link farm, likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3500

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 http://tablica-nieruchomosci.pl/uploades/fckeditorfile/66468325195.pdf In PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff1d53ade7---fasasatemasinijawed.pdfIn PDF document text
    • http://nessium.net/userfiles/file/47876189528.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/sowabonawoxiwawim.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f88d2fad---mimugasamamukasoz.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/812335147.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/1699854565.pdfIn PDF document text
    • http://royalgroup.at/tmp/39349484209.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703567bf270---19920273596.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/5315787160.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/dugatimogel.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9b30bcf74---zalumiwifebu.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a911841de29---fofijexemipigemiluxitasir.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/kedulifokefeposisozufalu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a82802a27---nuwijiwol.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/vqvstqi68hkaj2flojvb9jhdg5/83727475479.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/77415247009.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/snndjftpss04f61tetb1don687/81447163840.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a67ca354e---zomesimuwomuxipizo.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/24116972541.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b83fb0261b50dbfcd36a08f10191a0c4/fotob.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/zodasitagugerefuguja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=facebook+messenger+kidsPDF link annotation
    • 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_off000168a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A2 10780 bytes
SHA-256: 0e679850e1f83e3477acb11413e629d4037554dc5bdfd6e4315bf122163c4c8d
font_01_sfnt_off00018133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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