Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be5bc26e635cc7c…

MALICIOUS

PDF

70.3 KB Created: 2021-09-26 11:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bf9ffd7a3c9c5ac47fe5482d61d0b2d SHA-1: 1349a4db539a55bed80b5a3446371a7a8f966615 SHA-256: 7be5bc26e635cc7cbe20b03156400fc837486b790f4089e0db85043fef51f67a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://pixomot.ru/uplcv?utm_term=ios+14+dialer+pro+apk
    • https://nacionalequipamentos.com/ckeditor/uploads/files/gegakaxumido.pdf
    • https://daiichitravel.com/uploads/news_file/48458169013.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614bfc0f2d6a1---tibivomewanavefunegepat.pdf
    • http://fsanaq.com/upload/file/2109110204312422523b3tr3nozda6.pdf
    • http://vmkmsz.hu/userfiles/file/52382132024.pdf
    • https://prosaison.fr/userfiles/files/nositaxebowa.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/40155ddbbc4d4212bee2638c486b89bb/85447424382.pdf
    • http://hide-bo.com/img/tmp/file/25338807647.pdf
    • http://movitecnic.fr/ressource/site-image/files/gozenudo.pdf
    • http://www.kowel.com/ckfinder/userfiles/files/1631464062.pdf
    • https://leganordavigliana.com/uploads/file/nuwedovubibelemosafajinox.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/rowopub.pdf
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/35607690803.pdf
    • http://cnc-soustruzeni.cz/files/file/54856714682.pdf
    • https://biocenfis.es/uploads/assets/file/38992632501.pdf
    • http://spc1991.com/ckfinder/userfiles/files/55305049426.pdf
    • https://poulinstrapscan.com/userfiles/file/60503962986.pdf
    • https://iaido-iaijutsu.ru/userfiles_exc/11202017454.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ddf62731c7d108519e0153f0ff617877/vejimumexevixavatusaj.pdf
    • https://sakura-bashi.com/uploads/files/202109100349083884.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210918043547.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/zidunuzador.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1ec5c567c9a3578f0aa3554c0a3a12ab/56168782637.pdf
    • http://klgd.spokoino.ru/i/upload/files/tumiletiledazola.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc2debae12---wikudekizaxuv.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_off0000b1a1.bin
4f053a7eaca1514e2da9fa1eeda00819a87a081279ac79b614f52627e17d93cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A1 16076 bytes
font_01_sfnt_off0000daa8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 16792 bytes
font_02_sfnt_off0000f2bf.bin
09e1b31c09ed429c148b7c62273f2f1764282c8cf5a02b8cfa737185626d33d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 10356 bytes