Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e99b1b979757b22…

MALICIOUS

PDF

72.0 KB Created: 2021-06-29 09:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4a616f225f178f531116efed0025316a SHA-1: c7b3b4f5a19fef75041f497947abc8ebc55516d2 SHA-256: 0e99b1b979757b22fc36c81056a4294b728eca765e13808067b364a1dbf00028
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, as the document likely attempts to exploit users by directing them to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://huntic.ru/uplcv?utm_term=tamil+worksheets+for+grade+1+free+download PDF link annotation
    • https://condominiovillage.com/userfiles/file/90444108889.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b69369588b---jokozofawopejujabiruripuz.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/1pd66t66i11i7mrf42s596fca6/70207268670.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/licpp7b2nq5ni2rb0nor97qmlo/pasopiji.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/c3964d43a7c456be4ddc5c3182fbf40d/97493785386.pdfIn PDF document text
    • http://simpli.ie/survey/userfiles/files/74053791193.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/37279217606.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4cd22dc5---zomezolikabun.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/jcb94tkfreqsvgqtnrtkapnpfe/77432683807.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/q600s96jpp0tqkv6ctlcfdm4dk/21778833966.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e03e6931d3bf0b9e674c70b293c6c617/63683853594.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/mekaw.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755b82821ea---88751804486.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/baworitawuwemo.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/60884172316.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/44452140509.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/ef90c5bb7684d20c8c142c7fc90659af/bunibijulodawusanid.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07ffc6c237---nilepovefiwefewuxidi.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/lonimasezuvib.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/66869802463.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/wopatirelexi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9daeb057b---54141140918.pdfIn PDF document text
    • http://altinay-law.com/images/file/rapomisirubemakegu.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/nimumetivodo.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c74c110b8f7---64735495026.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/4b967t6n7nq1rvgo49pob8hfq3/5015030515.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_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 10996 bytes
SHA-256: 169044af2122100e8082ab5e6767d02df093960bb7a735a4fe15f809f0a79665