Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9bb039add3e9ad…

MALICIOUS

PDF

84.2 KB Created: 2021-09-19 05:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa6b6c06617180f52be3c38a8adc3901 SHA-1: c3ea86b39612116420ea1952673e46db2917fc5f SHA-256: ca9bb039add3e9ad9960ce0597a245717b468b062d7b1df7459ea6575880c325
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an effort to obscure the ultimate destination. The presence of embedded URLs and the overall structure strongly suggest this file is intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://bifruit.mk/ckfinder/userfiles/files/sumezisegowozikujotimopi.pdf
    • http://www.santamyoga.be/images/file/84964114659.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7d4d196cd2db8364e78f896cb32b64a3/pibika.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/3bb0fbfc9a100b93ec591d6b6969a188/85456978307.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/mujowewajudojafezuj.pdf
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/disabokakurej.pdf
    • http://nessium.net/userfiles/file/dezoxuvile.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/66165739876.pdf
    • http://sgo-bage.com/public/files/files/30757158420.pdf
    • https://total-sport.pl/img/upload/files/bavafobedafakefumojujuru.pdf
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/jajowo.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/04d569ae5beb54f788cddfb4b12f0eec/fokugemigalegojuvewikag.pdf
    • https://feng-shuiworld.com/userfiles/file/jasukutij.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b6f7b369997e3f6e1926f00402b7dde6/29030884906.pdf
    • https://pierrelemagicien.com/userfiles/file/xopugukogipidadare.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359dd704a04---89812082052.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161359f3ef17a3---zetemiwodulunefizu.pdf
    • https://efsanepin.com/calisma2/files/uploads/guzuxopefiduratikisod.pdf
    • https://shidoremicrosys.com/media/18775294806.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/92d9f81a4223a83435cd0cad28464c73/49329318061.pdf
    • http://thietbikhachsanvinhhung1.com/upload/files/volalakuj.pdf
    • https://commonlawhouse.in/userfiles/file/ranozuporudojagu.pdf
    • http://panda-es.tokyo/yamituki-n/uploads/files/45576468851.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sports+cv+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41c.bin
c42de5dacc42c274f72981180fe25fe372fad8ad6130378d2183cde94cde2ae0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 10220 bytes
font_01_sfnt_off0000fb21.bin
f4e602cc883cad479313ed9f5eb4a1995309eb4996c3d9e69cbc5a2db1040fcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 18412 bytes
font_02_sfnt_off00012b42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 16792 bytes