Malicious PDF — malware analysis report

Static analysis result for SHA-256 beef1fd129bdb03b…

MALICIOUS

PDF

85.9 KB Created: 2021-07-15 09:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 29dfa10152aa97b71e36cb2ad2c05e45 SHA-1: ce3de009ef82dc6d3091bbbb72d8c4723bd33799 SHA-256: beef1fd129bdb03ba3a3d52be4c6128ae9a09f0360ea94b98dc8e288fe018285
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

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://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c55a5bca1---78953804399.pdf In PDF document text
    • http://innotec-industrie.be/userfiles/file/24375146056.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/98429957167.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607844983d731---rodulunapuzerizijos.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/77023406062.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c151013febb---81111414044.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/81518752518be122a78056565acc3ab3/gitegoladilamajodoga.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/urmp48bm1boebod40j2pbda4u8/5038276599.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/8b6a002dba021b18a52640d8ee347021/52436376218.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/edaef30417d45170cb5acf3389f5b46d/69573103630.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/11803875881.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/99888223781.pdfIn PDF document text
    • https://ka-base.no/images_content/file/jizevab.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/cb520d43a2c59a48c914af1ddb2b2230/kedufuninagunevomami.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c68f46451---xozijisanoweton.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/28187854833.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/3610630385.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/5esu81nmdcvubbdpkr2bkc0kt3/zitizuvonulenunome.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160706d30d532d---42662917690.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609df3922001e---44617579831.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b97517afb---javujiguralalidox.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/dd1caa069b2dc7d834f818e1e92460f9/70489300961.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078b415b4c2a---fokudasonuwoda.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0d1bdc3f8---fimenuxakileteb.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/nemoremarol.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a7855e865a3104c1acc6822185e84d2a/jidukewozutepebajuxuw.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db105b018f---17045610040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+apk+store+for+androidPDF 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_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 16684 bytes
SHA-256: 0f3480c33c9e7e9d0464876663067d305d20f4828c87db34595d4e9591b76f90
font_01_sfnt_off000123d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 17608 bytes
SHA-256: 197e972314ffb4279982348c9f34619cb40af2e01462e139e1a89b68e5dfbeb0

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