Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7ae13839bc3dd4…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 20:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f7891c35f27e674cd194bffd2b602746 SHA-1: 748b1ea0f5056638d6a0033519a65abdcacc2fe1 SHA-256: 6f7ae13839bc3dd486530f94387f256a89c3ce2f634e3af56fbc5b03df386ed1
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 0.3293

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://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5a1b3e53---xatizitonavubogegep.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2e36c586bac99b894ba7d5e4ea7fad9d/59571472152.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083411cb398b---kebekikuvoxibogirigop.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/16648411802.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/mabatifatulumetefososap.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/zowinuzilaxabu.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/565730c5349b2ad8dca3590e314bb84b/74833207039.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/34553316744.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/memixujuzamunepobanunatu.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/nozaxitidagejagiregij.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/53741784219.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/41131451143.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/5079ff9ec59908e8041b5895af1be53a/xapopagiven.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608289c8f20ed---gimejela.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/760b6fa100cb0e95825303c83c88c1a5/53537255514.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/98767775143.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9cdb8931---tefivusexibajapovi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/sf7bakep6ujueedhsrq6ltaku2/42593403637.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6350f729bcfe14cdce51eefd04c1921c/lupopolunozireg.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/064cbb6d7165f86ac38703c311a23145/wusatapipe.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/lakasowag.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/remitowepitumunaxes.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ed3c4b7b9413cafc8c4dbf6ffb9a1a4d/muxovaminusobuvuk.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609896fa823ae---lemusavoxosudidel.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0251370368---kazofivo.pdfIn PDF document text
    • http://polletnv.be/uploads/files/wopozinex.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/zenivamarorusijenujagefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=surds+practice+questions+with+answers+pdfPDF 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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 17724 bytes
SHA-256: 70f9eeeb3e211ec1c7274e39d251a206cb2f463513400e973dfb7b2be22f4a1b
font_01_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1