Malicious PDF — malware analysis report

Static analysis result for SHA-256 1487f528895b275b…

MALICIOUS

PDF

82.8 KB Created: 2021-06-26 21:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9af48b6fd18e25fde5179fa2159832ea SHA-1: 1e661de60dc2723c41ebf6969fae4691ab193aee SHA-256: 1487f528895b275bfd907ac9ae739d20e41ec98ac9ba8ba6188f774e02195a4b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm that redirects to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV heuristic identifies this as Pdf.Phishing.Trojan, indicating a malicious intent to lure users to potentially harmful sites. No scripts were extracted, but the embedded URLs and link farm structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

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://drafthe.ru/uplcv?utm_term=flat+bill+hat+with+ear+flaps PDF link annotation
    • http://samtekelektrik.com/files/98506591661.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c4b6ee49898d535c087a6c18a5d07a5a/tawava.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0fcf5ba8014725dc34b251a03e6c2c84/50880951722.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/tofeviseb.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d2afe444446e1f692293903cf684139d/23204335769.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/nosevepugo.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/58363105831.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/gizofuxexedip.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/wasufi.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/r26uvlgdifdttkcto90q25mkmn/95530547814.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ec356bc78f4d44e5665cca7f43561cef/relesipavunovivowefoliz.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/mipoxojelovogozadoruri.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a169fbe8ff2---81888788935.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/66386592382.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070abc981e83---dexuwunivavavegeboboli.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/jeximedisimepatevufutax.pdfIn PDF document text
    • http://boxethai38.com/upload/file/vasadotafujavatizu.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/36668046125.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160838f168942e---71698745202.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082201fcb1c9---bulinafawiwowevi.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/0eef62e39688bf347681e2451aa98019/88080373474.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210506234929.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/53d6c55dd76977294d7f10022ddc9c40/xaduzijaviwemu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609908d51a309---49060502557.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/80113199208.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_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 10432 bytes
SHA-256: 25eb925fecfde6453943dd0d1bffa0985ca8a00d8b533f33207b0b2ec5e0c593