Malicious PDF — malware analysis report

Static analysis result for SHA-256 619da4d15377ffa1…

MALICIOUS

PDF

94.9 KB Created: 2021-09-02 13:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e5eac8a3fdf10944517fbec33055807 SHA-1: 0301f249309bbf742e184dbe38ff3561c595ce85 SHA-256: 619da4d15377ffa1e0e65a9007acf3ad2cbdfa8be2d532daa1b5456845dfc0c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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=esv+bible+pdf+version PDF link annotation
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7585930285---61831647343.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/jorivoxopamijufekoli.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/79069665618.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/16898523504.pdfIn PDF document text
    • https://magerp.org/upload/files/jijevuvunopu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ba5658ea6---24651215262.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/dizefokuzisidevusepomaxum.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/42a3a933fad6834374731840d892189f/wulawuvavozanuti.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/xewukur.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/vudusawifelivunegewe.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844722f2cd5---72984324940.pdfIn PDF document text
    • http://sns.hu/_user/file/98915857814.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/d9eb1c503c5df67abfd9e5cba4922597/pobevitosafu.pdfIn PDF document text
    • https://artenika.pl/fck/file/lasef.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/piwisinogoz.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/bonikimozi.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/25478076787.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cada193809c---xegoseramejegi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac91cb6e2e9---33547689624.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/suxobotuden.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b2e371e827d.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/imeog584hd69ug0fth45ctf1jo/57772526216.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210814000959.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zobabedexo.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///58046426391.pdfIn PDF document text
    • http://honda-vo.com/upload/file/zujaregamite.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_off00010e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 10420 bytes
SHA-256: c268eca33f004e8588b726d163f08998e2bd4ee1afece8662bb39b54b8b1504d
font_01_sfnt_off000125c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD7 18612 bytes
SHA-256: e21583a57d477eedcd94afeebcb82ab4c96d89a584a4b78a932193c86b99321b

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