Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73b96b5f7924c65…

MALICIOUS

PDF

65.1 KB Created: 2021-07-03 12:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2f11a827f82944c26ea8c87048777392 SHA-1: 719e78cdd1b457b2b8ecf7755857af1e4949f07c SHA-256: b73b96b5f7924c65d95cc1e98e1c20141f31046a2cd1280c13b04acd24b517b4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised CMS upload directories. The PDF document's structure and embedded links suggest an attempt to redirect users to external, untrusted sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4986

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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077de9a71f7c---49080749392.pdf In PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92947768436.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/rirexugadojigi.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/43913412014.pdfIn PDF document text
    • https://retta-bg.com/userfiles/mekixudato.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d8fdc1a2448f0b3843d02979ddffa889/47942812455.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd869a5b39---63158138737.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ko0bnol508g4re771cc9m20o2u/54450851528.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160dc68214bc3d---visugezerotezonimofezumo.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/2589274359.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/lobasekaze.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ef4b2319b---dovosezomizegamisukajas.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/pa64lu7np1s33ag1ap4184c418/ziriwusitisikutukasi.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81764978920.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/ravimuserelitewikosulige.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9aa553b583d4efdb4ac122d8092eadec/92989713436.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae841b0125---66534802288.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c434048290---86104874639.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/o2cu1pci6ia9n990lcvsugg82p/41614874416.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/72908527166.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/74516832383.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/t2s8jslk72mhsobsjpadri1icg/26180901037.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xinumaporuxidanorebuvijeb.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d383e4150b---53997940401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=1pm+bst+to+gmtPDF link annotation

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