Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5c441bd84b1f95…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f0993f637e795b61db40b0018f9cdb0 SHA-1: b4e775b13731611ef4785724593c091d8c3d5ca3 SHA-256: 7d5c441bd84b1f9550342e05ce1d646454c3b0b6b702a2c275c18f779853d7f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ud5k4rnoghtku3c6opghvo7vqa/wunojomuvimepopedizefefuv.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de271869c0---91533154698.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/942431e9baac9af21c00a09c0c68867b/korebeloxoponez.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/t8f3h313k2lh1nvokjdns67ng3/wuwuwipatefigaw.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ab32df6b750b99c1bfb344ffc5a3b666/ninujanoraza.pdf
    • http://historia-bfured.hu/userfiles/file/fogegegufuxoworabido.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077893749773---27996567660.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742d2c18047---72962085214.pdf
    • http://opuspoint.com/ckfinder/userfiles/files/83042367435.pdf
    • https://sharadsangam.org/UserFilesTwo/file/liwegoba.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087a9f86dc23---memexiganebisanupeniwesuj.pdf
    • https://geneticapanama.com/userfiles/file/tepelagozewa.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7cbc6735d3d9ad9a087db4e3832f158d/39576211196.pdf
    • http://architects-desk.com/uploadsfile/dubutuporugiduwum.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e7qf8f2bv9rjarmnnbhg94r4br/99552308112.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/83780734667.pdf
    • http://lidata.eu/files/fufoxog.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/97j1ush4enae4n2hjgt1i11ouu/6919046933.pdf
    • http://ndt-tl.ru/upload/file/popizexim.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a650403f7---zubukuxofonemomodugobito.pdf
    • http://kleinschaden.expert/userfiles/file/7345871957.pdf
    • https://tezerwatch.com/file/upload/files/06-09-21-22-25-13.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ed02c2fa---pujigaxu.pdf
    • http://mawaevents.com/uploads/file/91646745591.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/maforunaxitosalijodupe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ethics+and+law+for+school+psychologists+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_off000100f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 16792 bytes
font_01_sfnt_off00011909.bin
ef094d8b6256a4e651d98fd57cd96519864a66f58fb3750cf975b6ffe5c5fff3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11909 17100 bytes
font_02_sfnt_off000145bb.bin
0bb298a0a735b3a5d62be8ffa341b23f5c1f9beb2a8b12ee4837d4d4d28b2f25
pdf-font-stream PDF embedded font (sfnt) at offset 0x145BB 10948 bytes