Malicious PDF — malware analysis report

Static analysis result for SHA-256 2811bc96d259a4c5…

MALICIOUS

PDF

82.7 KB Created: 2021-06-29 02:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8ef17754f7ea7330521780ed9c30425 SHA-1: a36bdd6922f3a0b5f616a5725dfee6da11e2691f SHA-256: 2811bc96d259a4c5926f18b5540173aed2a38385f179527eae4641500d5d2404
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crewmak.ru/uplcv?utm_term=vril+the+coming+race+pdf
    • http://botosani.ro/img/uploads/file/6185204865.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/nawobutufo.pdf
    • http://the100voicesofgospel.de/fichiers/newsletter/file/jibomedi.pdf
    • http://illinoislivestock.org/userfiles/file/xegajotoraz.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/dbd1c3dfa52c6b5a9f72a29e9d6df122/81065872268.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092d75850dc4---88052597614.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/9b0f121205bf0a929c9df0a6983d236a/kikelivusumuzo.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a62aef1d0be---29131816925.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0217a2f85---milesakovimawaxokega.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/qcv9gqtgk4g13cmbvah325henp/90223374956.pdf
    • https://atl-50.com/files/file/wuxudaniv.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6bff4fefde5142fa9bc39e4f878452e6/rituzed.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf6be52435---9215005447.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/fbc2af77e2fef69be1084e60f316e510/35774960942.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/3t1ra8srdsikrl7ofjo1qdrvll/jetitelajovazij.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/oommb1rh6v71tvdvr18qp9cnu2/vonimewamavusozemidijilun.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ov86h4md6jcl8qd53es5chd872/gulewodenubomabok.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/deg9f68295ohqu78f2t071ie4f/xalolikajilukidigodijika.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07504ef09c---fejawisigesasizejoxodez.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/adfb0d14a12e791a380ec1480825ba84/vedakupekufonuziwipebis.pdf
    • http://szao-spb.ru/images/news/file/tuzilomefewe.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160860a08ce856---kimonibuzudijafefusovos.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608350e3a4195---84787174508.pdf
    • https://dailyhondaotomientay.com/upload/files/gaxibur.pdf
    • 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_off0000df73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 16792 bytes
font_01_sfnt_off0000f78a.bin
8ec8f6f9d1687930df9190caa874d2a722955fd4df99bfa465b2e0c5b50f9e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10868 bytes
font_02_sfnt_off00011039.bin
9bea39a6ab21b44e73439fdcbbfad60675052c6d39e23c4da444401e35ab2ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11039 17388 bytes

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