Malicious PDF — malware analysis report

Static analysis result for SHA-256 e119cebae222a16f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-02 20:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 94d64b2cf150b40fb104a86d49411867 SHA-1: c1cc513100033f4b03188bf10167f49b1d74ff95 SHA-256: e119cebae222a16f1ba396074bf1b8961fca52a4a3738166566a8b9b05bea00a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised WordPress installations or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38842084a---6082909088.pdf In PDF document text
    • http://mrybalko.ru/files/8969345088.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/81446609220.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6e9ee65917f60215405b6fe85193f6ff/fekopififudosuwop.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/61470828641.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wujixijedixabe.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/7trrot5k7no5v4l7e9b58uqron/7939744373.pdfIn PDF document text
    • https://dineflon.com//files/23728127849.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zadodoxigusoxebo.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/nelotilofitelalakiro.pdfIn PDF document text
    • https://vestol.bg/files/file/41101971285.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a56fae992a4---fitivoletanuwese.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/kejowomivobekuf.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/bfa7d9d39c0ef3a7980edd4fd89f4555/favulodes.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/jelogepejoredi.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/548236563aa8048d39b844db5c977fa8/lagudegug.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/63566082508.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/644fc8274229dd138f93937ca33bcee8/66411781805.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160839283de962---jakujax.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/rawugoj.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/594ffc69055db30a1f9b8971aa4e1edd/80900829767.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f82181200a87ab8aeed6799887eed508/rokobetawokas.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/l6rk8043dcih778dfdes9d3jum/wavisagusarubavomedadak.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1626733659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=uipath+tutorial+point+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_off0000ddf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 16236 bytes
SHA-256: 8bb89f1f337d4381a8d060d58c30cb8184c93d2385fbb78ccec60c8dda63f89e
font_01_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 10400 bytes
SHA-256: 1a3e6ebfe20ea648d918dfede6445800b96c9636cc081cd7f5f314c1a884f434
font_02_sfnt_off00011f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1