Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d07751497c28ca6…

MALICIOUS

PDF

67.7 KB Created: 2021-07-05 23:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0df850c95edde0c5720a3db733e0ba4b SHA-1: 4662801d80b923bbd19096be406f4e1f3f54bd2e SHA-256: 1d07751497c28ca6424c78cd76d9d0a2cfa5be33a765823b842070fe4d2c7699
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories on various websites. This structure suggests the document is designed as a link farm to distribute malicious content or facilitate phishing. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf93f78d72---41222008353.pdf In PDF document text
    • http://asr-net.ru/uploads/files/bozaweselaxi.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/parsacaj8iphb8ilvul9u4kr11/62290037253.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d99d647de05d0dd8d9614f29fdaa4f8/pibopim.pdfIn PDF document text
    • http://aonetreks.com/uploads/file/64553609241.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/wepodunekujidejewogimabeb.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c474c8fb72a7c03410217e7661845d5a/42303454793.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/ec7321517b8bddc778f25316cb5b7a71/jexezeliwubaxivumosodet.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/97284855088.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/pc268ab8heudbdr2kk6sapnivb/24213712785.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b1024756a3ebaea823773bebde009a5/53425990758.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a9366312---9998901782.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8c0vnio3497v7q0jcnmqg21k9j/16959244038.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/zaxubejukananunek.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4b816e4ee810df145c3297fa8b76689d/sazupesotagibe.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/80e0df3ee07cc09bd77e55de157d7ace/vepefopemejirutib.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26232362766.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b9b6d9cd3---79251785268.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/zetamu.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/66471463149.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/93563813510.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce52314e57---55027776617.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/rladjcumflf8tu6icgukp7n3f8/62905922605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=%241000+in+rupeesPDF 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_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 15712 bytes
SHA-256: 3d0fe22e0e688bfee016990136959bb6600ff1b53a41223b2e8837779d941f67
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 10204 bytes
SHA-256: 363a3181836504077e1cd6f953c12f73336750060925f77d8ad2daf30505ec7f