Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a8f0566af33309…

MALICIOUS

PDF

74.9 KB Created: 2021-09-04 22:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 93223901a4fbaa0f63e7b43129e426cf SHA-1: 8986e0ee9bf4bb72ceb3e9e79e8c55c275351c93 SHA-256: 86a8f0566af33309439eac18887bfbd3e9a7fe5afee6cbf5224f2a347f488ed6
154 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7569

Heuristics 5

  • 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
  • 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://azco.friend-match.com/upload/files/92998204914.pdf In PDF document text
    • http://hvezda-pardubice.cz/files/file/18480715644.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/pevaziwopivefirekavinix.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210626112824_v3lyy0.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/e93c8bc8a02bdac1b7cabc262ca2da3c/16269920561.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/lanitasowufok.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/61890211090.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2c7a12a9d---77148775402.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/3c3cffe25c8a0663a7d9e0b33d0adb2f/47593830681.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5smbp1sh7fcege55po80bpk1re/jeluxomemenidijovogu.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f695474b8---93929454656.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338d2a4a0d5---vibojubarodutebinijuri.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/30461871323.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c845884e8b---doxexoderezapelinazuz.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838e97db734---93849388030.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/tovuxibujujorokegelixosug.pdfIn PDF document text
    • https://hoongnau.com/upload/files/zoroku.pdfIn PDF document text
    • http://amandamaitland.com/images/file/tegitulokiwusewofuvod.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/39702814290.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/928bd3d8eea374c2f94f7a8ed670a514/90219613363.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cace4367b74---35982425672.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca1d4eb38---duvavisafazofajasasi.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/47197277404.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/zujuzo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=edgar+allan+poe+el+gato+negro+y+otros+cuentos+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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