Malicious PDF — malware analysis report

Static analysis result for SHA-256 9503d2aea74e1278…

MALICIOUS

PDF

89.8 KB Created: 2021-07-04 01:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af36754480d926d253da2b0abed7e570 SHA-1: 6002d5d59db96c62a0c6708ffc0ecf520f4e7ef2 SHA-256: 9503d2aea74e1278db21e6e291321c705eb80d77762a82cf65a82c85592062dc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier clean score 0.2404

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 http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609d47d7d96f7---domamubuni.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7d73b52ce---60461925946.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/d0ff04f40b610312fd11a4bedfddb64e/fekiluguguzudo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/113a2379b766f011ee9a04687046b9ed/kupisagunotexiravamu.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/ninuponogodijibo.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/g0bqb8vi3s8vb8bdm8m5vlrjfl/3407305942.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/3808780756.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/40db19884ade8f99ce86e628727363cf/36593023800.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/83da0304e94925a9d2ad536a589e6019/bonuvubijedigudivemirufew.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/96940277918.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/hk8vkbjadu9nmero1gdceq5qh2/silisulodotuje.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3e02f235f---xejev.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/42ec1c37dfc5409f7cbaeade76d06f88/28485501239.pdfIn PDF document text
    • https://fultoys.com/userfiles/29562242997.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160709c3fc2f3c---nupexupimejexu.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/218451df9db468dcc501342ba734d3bf/41255246103.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/31488504004.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160770b721e58e---52381836139.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/moxijufafavugifa.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/a3u6qp31g4mt32aum86vfrb237/99300062118.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-6/20210606064615957586.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/911ee6663a9ae3c23ed789d5d619ae70/lafunorujonilebonazanebo.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210513/file/16208466571442.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/78499922319.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d07d985bda3---lexazixorotob.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e176aef2392ae1e044782bba129bf326/varabibidakuzoruxowimitor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lange+microbiology+15th+edition+pdfPDF 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_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001495e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495E 11296 bytes
SHA-256: f551fbd418592d00e6f7cc12698d1e12656423811ff2eebe845e32fbdfa88926

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