Malicious PDF — malware analysis report

Static analysis result for SHA-256 e265d3dac102ea44…

MALICIOUS

PDF

113.2 KB Created: 2021-06-27 23:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c82808748e0f100dc99c3a2fa5fc17e8 SHA-1: 21ad7aefeaaaf088375faa07d0f75d748060db5a SHA-256: e265d3dac102ea44780da09d77d4ff68cc4fb9c7b15e9b9e20a4ea284206bbf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c195ede7d---jedubafulelodimeb.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a596880e779---vizesale.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9c57204e---55898317733.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c9b390c94---88993496696.pdf
    • http://baugeraeteverleih.de/benutzerdateien/nonutarelifexobisamonot.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607693212bce9---mujosomimepifutumemo.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/f9bebad9d2da07a8eb01fab5dfb4a871/davudosugep.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpr1hcebn13m01rulni8l3fd6c/rosemebu.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7bd48707---bagevipuzusib.pdf
    • https://pet-fashion.ro/mm/file/vejite.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd460e18637---17903276832.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085caff4b74c---dafodidazirinok.pdf
    • http://camionespanamericana.com/userfiles/file/86358025171.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/5fd1fd95ab5e7224f548d1ad18c086dc/41066821374.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/fekaru.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/or3bfp5vhl5tjomvr5h7eaiadm/sureraxanenejosepedo.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/76419cfb264dc31c27af58dafb96a235/deseguzebekomeporimiwogi.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nsk83huspvekmct9vqmt1su60v/48898116811.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b06db53b611---15754536942.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/snmvm6ib8dmnirtcl0erlii5f3/nolanuv.pdf
    • https://wsbtitan.com/images/file/79778196013.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=centipede+with+wings
    • 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_off000158ea.bin
f422ecb9ab23d83f0e02d12703fb0815b0db138ac558b0bf3a97c6dc9fddd285
pdf-font-stream PDF embedded font (sfnt) at offset 0x158EA 18296 bytes
font_01_sfnt_off00018893.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18893 16792 bytes
font_02_sfnt_off0001a0aa.bin
fe7ac95caf61dd7b42d18105309468a7293c729bb4115fb69ead3ce0e37ebcaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0AA 10360 bytes