Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ea821be1c30044…

MALICIOUS

PDF

74.1 KB Created: 2021-08-28 07:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9936f68c1426a5038087bfb1953a6ddd SHA-1: 69bd70dd6206c70eb71368058cec2848a5b402b3 SHA-256: 89ea821be1c300445666c3849e56edf17af652e7be091ff11430c085cee7629b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://oniceh.ru/uplcv?utm_term=the+godfather+coda+the+death+of+michael+corleone+streaming PDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db66bb3544b---zatesiz.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/972cc3c5fcf428823d12f1f6e960b771/matuburabuwekixoworupal.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/99709630026.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/96064642801.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/niwalazomekatepafisanimef.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/48334014678.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608db085b047e---98079902624.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/15289817753.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/92053086315.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/df44c3f20d3360223d6305529f86959e/xagezagodopudum.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ae5f43ffe8646596a94b68b43ac69bde/63598927906.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/95967915636.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad3e2f414d---kunobufofediz.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/40436511255.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/pigugolumujixepovezo.pdfIn PDF document text
    • http://chayka-svg.ru/files/88154021613.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/23852512995.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/14443898775.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/vedore.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/lidukezonadupakid.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/mafatisadosizoke.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/38842927687.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5c59d4b38---balifap.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/63699756165.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac4bd70f2---77585789876.pdfIn PDF document text
    • 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_off0000bee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE1 10888 bytes
SHA-256: 6535f2f091b16fc6f04919260faf41f308c3d971850ae6f0534f07d826608528
font_01_sfnt_off0000d7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 16984 bytes
SHA-256: aa91d57587554d7b623e0795ce16175ebe4460de7757b74b81522aae015cd59a
font_02_sfnt_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1