Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba88772f6ef7c2a4…

MALICIOUS

PDF

90.0 KB Created: 2021-07-12 17:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: b4fba6058b1490d0b0c11718c6b255bb SHA-1: 199e9e67b7759221e9696ec9a36520aebcea3fc5 SHA-256: ba88772f6ef7c2a46fc2ca26943e00d351fbdada5aab3789f3d8f0e19b9ab708
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 suspicious score 0.3632

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://wastran.ru/uplcv?utm_term=spiders+with+long+legs+and+tiny+bodies PDF link annotation
    • http://stardentalcare.org/userfiles/file/kobologapi.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/73957579275.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a900bafbc---jikigubelupokaramin.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/m030ftgc69o3l1cub3rjdvfb1c/peviroduzadenojogetivu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1010975a2---xibeketapukoje.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/31033875096.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/92052863162.pdfIn PDF document text
    • https://toocapen.com/files/bemos.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d379b7cc98---kepalo.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e7d7dbd948ee76cdc9a001057903294a/tekisup.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e5b36869---ruxededoxurabedubozuvoz.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d18fa0cec54---dojubivuvinetu.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160948388935b7---matuna.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/pfkt5055av8v3rn9djqng0jsf4/rabeleguletonazuxivaniva.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/leleviponetedizateduwopu.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/8aqr5mg91d4ni1ualkpf8litq6/vovuzutukefepajexinoti.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160da861d17347---lolelitiz.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/vejefu.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/70805622889.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/xekoxasidep.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/86748397164.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/povupobon.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/vowogefan.pdfIn PDF document text
    • https://master-service.ro/images/file/lasalet.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/728452490.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_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 17460 bytes
SHA-256: 6b03af4a155e1ce08fcdfa9bf2921e06fa8bc6943b36395bc4267f8ae9dae967
font_01_sfnt_off00013bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF6 11084 bytes
SHA-256: 6dac2eb4b9ed19423d408d33e9f51218475d03758c769d747bc106c21e283414

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