Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c80b9828e520dd…

MALICIOUS

PDF

70.3 KB Created: 2021-09-17 10:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 33b379ccbc4652264693f73ef0bc5ec5 SHA-1: 2a6914fdf2db7e5d0d8f33ae2deb0a0053099ee7 SHA-256: 58c80b9828e520dd1f1eb70f4f2bcac38b0de5aa539e42cd12a8e4ec04cf03a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://catamma.ru/uplcv?utm_term=beyond+blue+game+free+download+for+android PDF link annotation
    • http://www.tobywells.org/media/fckdir/file/fumabarijediwimatodo.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614420abc7b17---21430726102.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/karubolapufozotubivopudo.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/5695416921.pdfIn PDF document text
    • http://szpk.hu/_user/file/60341740739.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/kafebugepawokare.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/jarubasetelagob.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403d6e9cad6---93126714740.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/fiwebiledekoxelu.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/49072934583.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/90672511441.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/tejarubivawan.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/peginodinabuk.pdfIn PDF document text
    • https://ka-base.no/images_content/file/33206199274.pdfIn PDF document text
    • http://jonme.net/ckupload/files/74350365082.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/62166163751.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161330cf4b365a---78492074548.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d59d7de8f4---72195401021.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/25559153358.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/togepojip.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/mutusoga.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/rodeworevofetafidete.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/ravevofajagagemefezib.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/66562482523.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/88877274149.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000b4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B3 14976 bytes
SHA-256: 9474dfa1c6965e4c9d92c80e61a02ebd7aea58a4f4a6d5f147b2a4584e2ab993
font_01_sfnt_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 10924 bytes
SHA-256: 8a2b5fa7eb809d38e49aa7e2e4361b6891455fdea4ee97a6782c436d74193b1d
font_02_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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