Malicious PDF — malware analysis report

Static analysis result for SHA-256 132533bd9c7ac053…

MALICIOUS

PDF

104.0 KB Created: 2021-07-26 09:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2a5cfa26436dd811dbd33dab1c8922ce SHA-1: 097667e383dcfd7e8373c3a7b425ff29ae941e10 SHA-256: 132533bd9c7ac05326cc58a099b368353fc155efe6d39f58ac28e94171e9b587
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1612

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://absolutelyneon.com/userfiles/file/musafuzotefigamefoxuv.pdf In PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdc1392fe94---15929562320.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607128791b58f---kapawugewagalone.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/zenonitabaviv.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/ii37mvmhj3vc4fvm5hvb7qr76p/45443358897.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/om248tp4bnq40t2sdkusoho7hs/buvabizalimafase.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/c7f6903447855edc86931fb0c01bddb3/nosatunososudej.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e37516c5b6d---80335706298.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/pixulamebezakikapovivufo.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///32685595523.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/4b844566c70caa95968a667e982b7578/41831922072.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vizinafukoze.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/fetenafugixope.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/14456185907.pdfIn PDF document text
    • https://cape-electronics.com/media/file/79674612675.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20da417ca---vakaletofowiki.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/37118189092.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/743f4de14302f90ab8929c2b4e1edaff/pulatonatuwiluxov.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160863e3a15784---fijetaxinojavusono.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7891472ae---52826298068.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fhqrlev9n456fbi27rvflciet1/roxak.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/sololosonima.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/solakigexi.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/13605165651.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7112ebd0c---wegatilonikifeja.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/lgmoblgsdpdans8bt32hegpsn6/98567834326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sources+of+east+asian+tradition+premodern+asia+volume+1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 18000 bytes
SHA-256: cb360bceb0c3375cb9f60a5d322bc698a04825340e497d31e7056d6219248567
font_01_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 29640 bytes
SHA-256: 0b5d5cd2e82dc15875df07f5d12be351a4c45b876e1bae210128ad5912162970
font_02_sfnt_off00017c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1