Malicious PDF — malware analysis report

Static analysis result for SHA-256 94155cafa8745f2d…

MALICIOUS

PDF

120.7 KB Created: 2021-07-18 19:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c4cc82af1b9d77f398e6caaf449a4779 SHA-1: 554e5f2ca2e26b15a94190fa7c7eab0d348888ea SHA-256: 94155cafa8745f2d52fa1ee390f4e362e54e10db5e1f7de4e97d502c3d3c83d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feebb95f85---57986939667.pdf In PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/u1h2064hnqieqeb5mhmhv9a5u2/bowudodaziwawogonodopogi.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a108a242367c6bc40f792688692e7562/xanolowika.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/ridosazisusaxezowojuse.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305f8709c3---36764321960.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/pdtcheq2m19u3tqjn5h3ht5tlq/bufuvunosesili.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/db8855e97e31da7bf806d2c54965c5b1/94036741314.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/71905037651.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/vazezigiv.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fupugojuxorolutirefe.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac86f9a981d---35936029545.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/83508645151.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8153ca26e---79298098720.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/13031327297.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/p2ripkha5dnpqgllhvhp7osv06/rejirefupalo.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/23856559296.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094dfee6601f---26366553346.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/bikufed.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/14921015366.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210608234306606.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/kljal58dv01f3hov41fsrralj6/82900830422.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/1a8b6c5447b0b6c466d614dc7ff8f3cd/sewidokoxemenajositod.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/b1e7e9f1834da4e08e3290957303bd3f/72191460040.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/neriniporafozixevol.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/4d881adb54b60828ab4892faf75c6fa7/foluxasisujubugewi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/lsphu04mmqo8tgjcc82bnf8j56/84635147417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=who+is+the+founder+of+monotheismPDF 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_off00017844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17844 17260 bytes
SHA-256: 067d7f6c4d2f95e205e37284c7ce59f3e99250390869fd40d73250e94573f68c
font_01_sfnt_off0001a51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51F 10504 bytes
SHA-256: d04f237b2d9405e772b1d8fe6060e7bf7567b4a762a8cc24d99370cabc3b0ecb
font_02_sfnt_off0001bcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1