Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbf2f13c0255bd8…

MALICIOUS

PDF

85.5 KB Created: 2021-07-14 08:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd9bf3a5538280f1a4be1a0a82a4946f SHA-1: b244350245de12b8c3d32b93f8525c38dcf73c23 SHA-256: dfbf2f13c0255bd80ac5156e028bf53a33c0b0099b60a1b1757f2e3f6af92181
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of these links strongly suggests an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://alituncer.com/userfiles/file/lejadaguribe.pdf In PDF document text
    • http://samnakthodrahassob.com/userfiles/file/45944936279.pdfIn PDF document text
    • https://nada70.org/userfiles/file/zatatetojuvemaguwigi.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/89166105054.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17e39b5084---kefivenorobomefodubava.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/95433932579.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160737a7cbe602---2039558107.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b22acb1d441d1ab4f95926cfae410231/degomuxusedoz.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82763e5196---tokolufigabimumofixero.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/38010736610.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a896baa89f20c21a6589bf7b6602f03e/womituzivenugutodosibovem.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae888e06775---zeleguguzanu.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1699808a5---36178971153.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/elhb4gnmo7khl5dm6d5n8dd842/28506428571.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdfc895911---monanexiwijifeja.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/0f4555bda6ed06e98b0a1800bdd170b5/83424903282.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981fa2f06ba---36279930284.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/ralubine.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/109966914660c25dc5796f7.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/4n438hbki4sb0jfg4fn9l5pj62/75583609981.pdfIn PDF document text
    • http://nineslash.com/user_file/file/gikelogul.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/ferefuxabodotudipoma.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac966e028d8---pazudarisawoxopi.pdfIn PDF document text
    • http://schubert-hh.de/image/file/51321284077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=running+ethernet+in+finished+housePDF 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_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10568 bytes
SHA-256: 6cfd9d56732f13eb9314ef093690a6c5a1e9b70a30444e1612cb05ef691cc4df
font_01_sfnt_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 17036 bytes
SHA-256: 1af4c1124745f2b1044134cf35365c341b1f4d49deae1b46871920a749efc2b7
font_02_sfnt_off00013094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13094 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.