Malicious PDF — malware analysis report

Static analysis result for SHA-256 888112e6bdc2fd66…

MALICIOUS

PDF

78.1 KB Created: 2021-07-26 18:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ad7d3505d06f06db4eb037a514b19e19 SHA-1: 43caf8dd3dc8b930bb99c97f5bab683fc15f6251 SHA-256: 888112e6bdc2fd6635c4cb88008aa6dce1d0323c3734c76e0da7e289f8b4d8fa
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body is unreadable binary data, suggesting it's not intended for direct user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d79l6folk695qf0etc0sr4f775/29859540519.pdf In PDF document text
    • http://sun-eko.eu/files/file/setimibogika.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/8453652467.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca05c50c33---63733056425.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mdv6rc8fb9ohpgrcmgpkn0d596/31899644274.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bafccd30e3e---vodapidadenejezojipis.pdfIn PDF document text
    • https://harom.ro/files/file/nupojikinasutiwuvoluzo.pdfIn PDF document text
    • http://texmet.pl/userimages/file/totukidavexibijagejez.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/zovinobegolojana.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/76940705182.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/339388453.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/40882717837.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ea473d28127ac3cf39b6087d3e3a05c1/64135940812.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2dfcb39be---37376406615.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/14799915521.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/biratuli.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ab358c49---72505269507.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/03b49bdd0675502a657d61f89e553c4c/dafiwokaludesesabebari.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/hiiotjli4ti5d1glqee921tqcn/disajofusekun.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/cfe8d30986cee0aa7344eaabb5460584/86610243431.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b54e045f35---43627754443.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f139f30874e---pikebojiwuwugaw.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b8f454d95---lofagexovutewawiruvopupi.pdfIn PDF document text
    • http://grupophi.es/uploads/files/vobagufugarezugodi.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0bcast07d1gnccuiq2evg5b37/13438757570.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/noxupomiruzena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=2009+rav4+service+manual+pdfPDF 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_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 11120 bytes
SHA-256: 38c071594f3537dacd5508d5ed7f3e8cf0a6df05a12909fa44ac87c25d12a5fe
font_02_sfnt_off000116ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EF 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13

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