Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5d565067be4da4…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 22:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e97a26b70d6ee83f56e53bf7a46adc9d SHA-1: cf45ca3d5d24f93d14ffa2b3fb064abdb4f78c72 SHA-256: 3a5d565067be4da4378bb763f2a96e4bad94eb6ff34031bc07916e23f1730aef
124 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV with the signature 'Pdf.Phishing.Trojan'. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised websites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://irlanc.ru/uplcv?utm_term=enterprise+architect+manual+espa%C3%B1ol+pdf PDF link annotation
    • http://kondicionery-domodedovo.ru/upload_picture/file/70389524116.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/4fd19ccfcfd804357db03c47fd7290b2/79577338085.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/lamojezikebe.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/fewisowolumonegujukavegow.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/76363203728.pdfIn PDF document text
    • http://altus.pl/userfiles/file/72716954207.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/sesudod.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/67012429685.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/1d1c02632aab2990475246ebaa558878/66618821144.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d15683a2d---52378752485.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/99729496701.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0ef5a09a60c6285504ff185b2bbc01ab/2485602256.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3839d0c27cccbf044f69c44a58ffc55a/32125584725.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/53f1d0b54fbba0a3d1626e7d1178397c/44764675832.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/706c6402b1459c72036448a841045868/nakivowikusaxew.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609810bb18939---godorikifasedupa.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/vowogefan.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/dataxaveseveba.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fututi.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/zirekipusatetuzenisuba.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/wisirajinosirane.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aac30f899e1---wikijexawulugatufebudu.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/97496557361.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/lulijelavezedaguzomi.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_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 18056 bytes
SHA-256: 598c891fb1365af03afa64d96a886d7fbb23f5796ffe28a43c34891ca3f676b3
font_01_sfnt_off00011f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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