Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a029c1497bde6f…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 19:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fd4b9d9bf742f4121ada23ae6d6a56e6 SHA-1: 459d0ddce6cc4ac69d8fda4fcc2716dd982fa6fc SHA-256: c0a029c1497bde6f020cb99af50f5b7e8159584278d2836fff34b8204523acf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to funnel users to external content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4a3551cb472a6073f34b97d77041f4a6/bukafuwo.pdf In PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/70396192927.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a0b20dc3---besifavatajofeduri.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/39230424538.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/pobab.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/117e130284adece56417ea6127b41573/mabonerebu.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/95326432799.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba022c977c---dadufi.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/rajivuwizegetivedojesani.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/pugenerujibolafipapag.pdfIn PDF document text
    • https://p87.hu/files/81646129315.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/85652835258.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/39299785211.pdfIn PDF document text
    • http://www.moyekolodin.com/files/81531421071.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076b06ad2913---xadisefuselelosume.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f211bd5d87---fazagajilu.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/29749824617.pdfIn PDF document text
    • https://bloomeng.com/uploads/limukanufafusix.pdfIn PDF document text
    • http://fairmonteast1969.com/clients/876766/File/xefiketarizaxaxi.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d521e598e---sobok.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/tapigijaziju.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/97178734577.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/velexexevom.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/10109307214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=microbiological+testing+of+water+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_off0000d057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD057 16788 bytes
SHA-256: 5d289c6e24622a2a9530ea48b612ff623bdc3f0091c762e2e01596cb4dfe8d03
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 11012 bytes
SHA-256: 8230696b5a1055d69d23de563339dd3c8ec549df5d1883597aec8e02065cb958
font_02_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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