Malicious PDF — malware analysis report

Static analysis result for SHA-256 49368848a946581a…

MALICIOUS

PDF

84.5 KB Created: 2021-08-01 04:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a7635fbbe86db7a6a536429c849427a SHA-1: b4db26110e79d972f14204f753214aa7f8b1b710 SHA-256: 49368848a946581a21466de5266da72351d334bd8f39f4ab3aa623cd8c67da76
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure indicate it is likely intended to redirect users to malicious external sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5911

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://krisoc.ru/uplcv?utm_term=steven+universe+future+cap+11+en+espa%C3%B1ol PDF link annotation
    • http://aitrans.org/UploadFile/file/F1202105301419463658.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/92155011261.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xizoxavimugopogaxobora.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/c2bnc9861dt5k5ns1a8khv5de5/48461188185.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608172dbbe5b6---40901287411.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16242012434905.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f73a8cb40e---parubotemutogewowawi.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf6a4604e9---vibukexasudumabifiw.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/o9i37mpibbq7vd3phhaqv0ji40/towipagorafodaba.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948ba23eda3---bewabaxekifuzamitanirejuf.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/fududede.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/8b4058f3c3d9281e6cb7036e527dc92c/40052788689.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/835a87116ab15f1362ffdd9bd6949307/93496700012.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/s6k4nomdj7dhjrch3eu6srpd30/4172278839.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6cb234cb---60853599897.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076754db6e57---pigumafisuvaka.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/r79eb6s9c48ip621llk4can2vn/nakijakawovuri.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d4494ed8d---zidezoxuwutiwif.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88652c818df46d6e37478d9b6600d4e5/92087473017.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/22438345083.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/7232311068.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/wufukijawelolojenir.pdfIn PDF document text
    • http://amandamaitland.com/images/file/puvujibenegoxibesija.pdfIn PDF document text
    • 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_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1