Malicious PDF — malware analysis report

Static analysis result for SHA-256 06975f299d753b7f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-19 06:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 80faf031e6b9eda6b3a6f8658be7b8b7 SHA-1: a5a44b10da2a21aa1c5a504f521b0877eed7e4e0 SHA-256: 06975f299d753b7fb6e75e215d498866b42b33430c438b90e47ba429df72d922
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or redirection strategy. The primary purpose seems to be directing users to potentially malicious content hosted on these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5561

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=fundamentals+of+physics+halliday+11th+edition+pdf PDF link annotation
    • https://ibexquimica.com.br/ckfinder/userfiles/files/44844875693.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161416f02dedfa---77588655900.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142ab6876c00---95986053243.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/korurujuridosiwefosekox.pdfIn PDF document text
    • http://altus.pl/userfiles/file/gebus.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/tolelimebowino.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a64727481260b9838e779b04d338e3bc/24306802722.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161387a6438e2c---50872547214.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/vonata.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/86632265246.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ejcslh6ae0pv13vdppcm62onid/depuminogetew.pdfIn PDF document text
    • http://yuhongzg.com/d/files/88168948357.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/63665475552.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/59577200927.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/721596830.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/2722315177.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/95143595952.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0ho3qvmnlckt81fp0g9ufa7du7/nusufufiziw.pdfIn PDF document text
    • https://flomogroup.com/upload/files/delipagixosugufimabexa.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/segisiratoveso.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/8d9c076db716b93caa3039301d3a65b3/72990006257.pdfIn PDF document text
    • 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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 18316 bytes
SHA-256: 895a04e0f9aaf3f61bcb4900303ee0245d96eafbf331b307ca50789c4aca1522
font_01_sfnt_off00011a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A34 11028 bytes
SHA-256: ae01d6f6e0f83138d0a82ee23197ae0c0644077cc19b21f9853afae5841219a7

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