Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a09c1b5efe276aa…

MALICIOUS

PDF

68.3 KB Created: 2021-09-05 20:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a57589ae936f5c36d5c3db062b1e6fc8 SHA-1: 9a7f1b8a0a9cae31c48b082020a4d7e659a394a4 SHA-256: 1a09c1b5efe276aa6df7f9018248cc1e6c62266586372835ecdfd560b1a7e9a6
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs are likely used to lure victims into clicking malicious links, potentially leading to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://betenagro.com/sites/default/files/file/94323037432.pdf In PDF document text
    • http://ct-tci.com/cttax/userfiles/files/98070093034.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ujlkehghtjk0uqevd9b8nio1pl/60091758183.pdfIn PDF document text
    • https://majubesar.net/contents//files/kajalo.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/cf4c9d2f9c6b7f162db135d0066d7683/karom.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/rupod.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210515193751.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/nfdems7n3k2mg9lni3gkb8jski/10483342293.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/logunojozojenesudefonuji.pdfIn PDF document text
    • https://samtee.com/admin/images/file/mijugivaxab.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/gotalubufofezupotoge.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607a15674adfd---dosurusodegopez.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858a3f56505---28911519252.pdfIn PDF document text
    • http://innersolutions-uk.com/file/sevaxevelawarutapit.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/41557992230.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610149eec2897---fazufexudibevasasavav.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/35956670108.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/zewazaxuwedelijewi.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/20212015259.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6cd308754---99873238744.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b59f4ea3d7---wunifipuwozol.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/45817257392.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/34292040685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sleigh+ride+chords+pdfPDF 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_off0000babf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABF 16996 bytes
SHA-256: 868cadbd9980963cd1c8fd6914e3520afb54b6eee54fe2c710ab790d3b6d76d8
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 10608 bytes
SHA-256: e2b7591a8b1778af5c622deef493b975309a22f4b880cce08647543af9e8e0c7

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