Malicious PDF — malware analysis report

Static analysis result for SHA-256 881c2ce6d5d64121…

MALICIOUS

PDF

71.2 KB Created: 2021-09-07 18:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 464f296447cb1743a8bf6a2cb85d0e21 SHA-1: 9b04dab7d4aaf430601b016856a5ae18fa4dc98f SHA-256: 881c2ce6d5d6412184519e4b02c9b71415e87146167ad3bc69dfc63280bc95d5
164 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 embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0cd6f156e---nelififujanopoboxej.pdf In PDF document text
    • http://iglozawiercie.pl/zdjecia/file/goxidomefosedej.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/32174732095.pdfIn PDF document text
    • http://kezmosas.hu/files/file/15117573804.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/2590da47a60abe88b1551a36ff0a3e23/sulobobesetaditasotadiro.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/zomoradukujowo.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/86803b734361432cda6b50644e5ceca1/sofilobinow.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5582997ab5---fasikawotetomedixedoxo.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/wivir.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/68034933667.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/17681749412.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/kozaz.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/lamapo.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/jikuparitavazovagozug.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6ffbdfd4cabf53acc0a5a12444baeac4/35258723300.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/69287301210.pdfIn PDF document text
    • http://newmob.it/userfiles/files/89890292381.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081cccebf27c---lovozuleg.pdfIn PDF document text
    • https://panama4d.com/contents//files/16816080793.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/93208050639.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/65277924525.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0f6f1d42f---zoxexobe.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc0d10339---73654662433.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=modelo+del+fordismo+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB701 10288 bytes
SHA-256: 41e2567efb31653c24691758f89b3adf2b44d21ad14dc1a649dda69c243aa26b
font_01_sfnt_off0000ce16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE16 16564 bytes
SHA-256: 5096b154c45187341c4475bef34056909f2558702aac89966ab92fd57e198fd2
font_02_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.