Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f867543138ce96…

MALICIOUS

PDF

70.3 KB Created: 2021-08-01 14:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a65b7e46af0354e1f2b0aabf1f23cc90 SHA-1: d572a10f18c68f54b05d347385d4ad6c9c711e86 SHA-256: 45f867543138ce962b72bede2f0c90b919a563c24e94060458dacbfca6121046
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's primary function appears to be acting as a link farm to distribute traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://hyperasp.net/userfiles/file/2507396656.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c1b50f560---lukugilalomimuvebixowum.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc79e0cccb---sobojafazaxirefapunuxeb.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/90171969680.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/595ec4ca79b8742518cc3f321a086874/kifuxanaxileze.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/lolowoxepibitukujoziwubo.pdfIn PDF document text
    • http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/70431729212.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607038835680b---jeloxivubupozijara.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/9757ec7acc77fe9368a7f932f6212e50/tatasuv.pdfIn PDF document text
    • https://ocw.tw/uploads/files/ranibajamoboso.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/27bbdcfd0d164d6441a87522beeff15d/40140140500.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/nomujaxonolitomatefitit.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c2192fd7---74855794237.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/muler.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/86281774643.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/74180788231.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/nujin.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/99333332945.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44d97db994---xejuvulafataro.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/wunidumoloxobebukevatax.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/wolukaluvujekisa.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/beretazidamuzi.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/nadajibatusug.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/31b64131c510ecdd2f0eca95517c8f4c/7843682950.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed5afa08f11---wewodenozagufo.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b2ec231111962fa4da9a862ef1f63047/75549556085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ebook+fiqih+sunnah+sayyid+sabiq+bahasa+indonesiaPDF 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_off0000c664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC664 16168 bytes
SHA-256: 89faf6e8be56b729b8940e73b02173c1c5a8586cefc3e2540353222446068d33
font_01_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1