Malicious PDF — malware analysis report

Static analysis result for SHA-256 0150656403e74c13…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 04:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7c06489a7bf5b7ba9f18a85d0cb21ce5 SHA-1: d6a3238ddde325593cec8c09d55329ec8cc9dadb SHA-256: 0150656403e74c139102fbef7ce141e7d117cf2d6601701a614879e4f225049c
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous external URLs, some of which are hosted on compromised CMS uploads, and includes a visual download button lure. The embedded URLs suggest an attempt to redirect the user to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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 http://ymjgolf.com/file_media/file_image/file/tevuditidiraliwopuxedov.pdf In PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/516760d492f75b8bd91d8900836cbc92/xetogaboxamax.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/39949059924.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc7b4f265---nafunawotokukuf.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7829fc5b6bad63e80a63a6ba972793f6/70044619099.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/susaxivozo.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/7384985713.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/35334841538.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109e5d901520---98661404433.pdfIn PDF document text
    • http://gibisch.biz/files/files/19491159588.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/75534939407.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/85086093840.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/rufazij.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/82176281758.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/mapokifafebival.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f68cdb0481---84232681453.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/80381473984.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/75750610517.pdfIn PDF document text
    • http://pololanna.com/user_img/files/bagafuguvodutuxorunezidew.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160724d27907a7---5328088852.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/42354635252.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/62436645469.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/82c5d651aa6efd94298faa3edd3163a3/96514427043.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083a29c41a4f---junejumofe.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/27894392683.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608bce1d0344a---ruponegakowodowogivekegop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sbi+clerk+pre+question+paper+2015+pdfPDF 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_off0000d1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F0 20560 bytes
SHA-256: 04965b9b3d6c883bc26ebd9ed079672e27e53480dbff5f8d5b16fd43c6597221
font_01_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 11596 bytes
SHA-256: 1cd743437e3f73a2e3e47e81a32582996e3f80bfe5f72001e7a6fe646bec2ed3
font_02_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1