Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7b12c0712c741e…

MALICIOUS

PDF

121.0 KB Created: 2021-07-15 20:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02e3258b74076198af1f731fb84ba709 SHA-1: d9b1a11de9b53213eeea8e699a898507de791568 SHA-256: ba7b12c0712c741e0c55544de69e6405a6c2c9100864d58ae9ae1afff831d8a4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of external URIs and a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=red+lion+templin%27s+hotel+on+the+river
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/86fe5b6d1f116543946f2dfe8c391f49/45205287181.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094b14be0102---48235495435.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7006317bfc---85811055719.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c050b652b---fabokodafepaduv.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31f32437f0---pubirezegokiwalepubivasu.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2778639907c7282ac5817e0e44062eba/zanezem.pdf
    • http://ourpreferred.com/userfiles/files/57773436824.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac17c9be5ac---67045803392.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/pquri5ijmg1m0oum8klihu9ml2/duxofate.pdf
    • http://jhdljz.com/userfiles/file/1624212998.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vg2d2cb6oqeph56h5r9fu1uhb3/20657100729.pdf
    • http://controldellaves.com/app/webroot/arxius/file/miduvoge.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bfb2b4334---zanuwoxemogu.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/3487ad464fbbe373db7d65a7a34d0e19/zifinuwilugigivolixenab.pdf
    • https://pharmnet.cz/ckfiles/files/files/86795624231.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807baee621c---tizebifojoxinap.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1aod2s1dcabdg6m8s7uk4nguq0/78340983375.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/9bf1b819c7123a8cbd3c2689ccd902c4/gijuluwarorelugelafikifap.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41491b0ae---naminisekimom.pdf
    • http://talleresjpg.es/img/file/9605474839.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/em84ooiemaa7p3ske0j65afqi4/fuzevepikomowufox.pdf
    • http://on-video.com/movies/movie_data/file/26822659654.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/3a35af4d9926fa70ed106fc7db14f200/fapozixadisisuzigewisuxax.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a6d0ca09---duxaluxaguko.pdf
    • http://vodnik48.ru/content/file/suxojegajinegikizoti.pdf
    • http://www.ipkameralari24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9dd115485---febeginisinovavifaf.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_off0001763f.bin
0e68766be5bc1142d99a84d777f55e7eecf170678b3f06181625691035d43872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1763F 10640 bytes
font_01_sfnt_off00018e63.bin
3d26bb7676fe1434b4feaef7f2b21f39b332e66b2907063302fb6ef071940b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E63 18192 bytes
font_02_sfnt_off0001be3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE3A 16792 bytes

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