Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f8cabc170871b8…

MALICIOUS

PDF

72.1 KB Created: 2021-09-21 00:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fbb2ee54b494a2d3a0e4751522d45312 SHA-1: bf761e266296051e22499774ce0b1d4ec7e1296d SHA-256: 30f8cabc170871b8493db259dc0747a6016c009742f854bfe72919bc62577199
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to unknown or potentially malicious domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, further supporting this. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dataction.org/demo/dataction/media/23332364050.pdf In PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/12499198615.pdfIn PDF document text
    • http://ingore.cn/upload/files/vilewonumenidefiti.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/66520361027.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/sanukezez.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/koligafiguxobezupize.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/uiu2dtujkvsplrgqh5e73dkp7d/89210322413.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/zumazikes.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/42001581211.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/forimilugu.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/pirawulibelimofa.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/26657114559.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/nifopuxanuxamusozutogo.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/kovolepug.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/19b345a53712c4173e204efe3ee7d67c/36905139918.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/gobuxipa.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/gujakikizimofujigijesinow.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/nebubezufabadunapusejadej.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/jabufixinikizedo.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16141926a8b21e---lorep.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/94997964634.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/livozetumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=hamlet+1996+full+movie+online+freePDF link annotation
    • 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_off0000b39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 10752 bytes
SHA-256: 42f525a87db19eab7cf5314cc24da25d80be0edb230990e4ce55b2d80e474296
font_02_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 17792 bytes
SHA-256: 5f4af51b6bc2f29eaa9917fbe9e2145b981be0876a1bf68e4c4aa2f81a999a25

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