Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5378ee216c4d3b…

MALICIOUS

PDF

93.0 KB Created: 2021-07-02 09:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7697458bc413f012f92519239d43855 SHA-1: 5798b2a09634234881044c29c8bbced6815dbcbc SHA-256: 5d5378ee216c4d3b1f2485122632bfad6d55aa2baa72f4585c6756f1e62837fd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked PDFs. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • 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
  • 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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608780ad878df---tozewenuwodogis.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea3c79e6d5---42772758732.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607050087aceb---jifodekajudoz.pdf
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/fomipemelesajejaguwipux.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/754e38836558a4fab4f79ea78a65f74b/wusawudozijijowogojadexo.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c5abd4393---26506103388.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/fb7113ba5c85c00a212b477106e6b9a5/88644757215.pdf
    • http://domeinbeverdonk.be/assets/files/file/42180779103.pdf
    • http://flgr.ru/files/files/sanijoxomo.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b61d99914b6---38063486812.pdf
    • https://amursvoidom.ru/media/files/68210178739.pdf
    • http://architettoangeli.it/userfiles/files/11027922419.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b33adac513---furufapirabupatulim.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0eb704aaf3674f7f8a0937f4706c1069/dolagebipebawuviv.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/gc1gufuk6h5e19dof9h2a69o52/padokuf.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/taliwasumegelitonat.pdf
    • http://pijntherapie.be/uploads/files/bigiso.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607211a87cd09---zuvivad.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c7642b5c8---dekotisixe.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b81efb05---jebuj.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/827b1f4erci25bl30p2lcgkp2u/36196220652.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc94603c3---gezilo.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160714158dd096---63814466320.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a875e572c0c---7294892161.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=authentic+mexican+tacos
    • 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_off00010593.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 16792 bytes
font_01_sfnt_off00011daa.bin
3681f939b709a272bdae30ee6d666092ad15d352dd5e32371bb5297ece34e382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAA 10532 bytes
font_02_sfnt_off0001358b.bin
9a8c5972b5fa2a20c69bed14e3dd0e46958a5b208b6c20e4e7f25574938645ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1358B 19168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.