Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4e0308d3105d97…

MALICIOUS

PDF

87.1 KB Created: 2021-09-02 19:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6d7904a636927586ce92e6d7bd223d96 SHA-1: 6a3666c317b6cbebfb12d7e40b9763d4be1868b1 SHA-256: ec4e0308d3105d97ea4684617be6a0d6bbaee0f6ef0c0e11e587c0604e8606f6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3232

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 https://irlanc.ru/uplcv?utm_term=salamander+maths+subtraction+worksheet+generator PDF link annotation
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/fe0ibh9fclg23lr8cedbgk4k12/pixavubabatubesi.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/bezidu.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160700f98957c1---bufefozedutozivu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d68be4701fa---lomopeguropusejanapefedo.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/nozigevegivanolawalux.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/40767637323.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/moguroruredawedakivoruriw.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/fojamamaxeduxat.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/wuzovanesejekozigemabu.pdfIn PDF document text
    • http://lebo1977.com/clients/7/7f/7f96701a3ad848a090446b6ea7dc17b1/File/sidipuvefume.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/jitopuxoxizida.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/22647212052.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/42322101116.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b7896eedb---68481383744.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/iuubapsogfai3qge8su85b8pg0/14385157359.pdfIn PDF document text
    • https://migger.dk/userimages/file/59208162406.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/xidowisisap.pdfIn PDF document text
    • https://esz.jp/img/editor/files/83996481747.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/wisaxewatuwixuruxi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085e55a393e2---warowuzaroxiwidelebir.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/26886832955.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/82151482623.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/25b5349be0b3805efd204dabe521dc67/lorufoso.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_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AF 18412 bytes
SHA-256: c925dbbc13843bccd82e8ec64831b19981bef2bd731cebf718155699f18ad6f7

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