Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95232c4693db4b5…

MALICIOUS

PDF

77.2 KB Created: 2021-06-25 13:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82af20ba0c341e2cb6d3da340056fd35 SHA-1: 179beebac35a724f23527f4580ac802416f2d2f6 SHA-256: f95232c4693db4b50a73472a1823829ab8959f12b27ea438956e6eaa7241e5b3
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, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content. The embedded URLs and the PDF structure strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bloomeng.com/uploads/konepit.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/fc5838c35fba95432a0c92fb67fcfd09/latelatuzavomu.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/hs8f9ehmf1l3a4f7g87i95r89t/9270575474.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mp87gnr7jj1qdm30hvv9m00qu2/wopuruviredidugum.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/fe4d96705c774698f90808fd3cd7c39c/61553959453.pdf
    • http://sillajen.com/fckeditor/_upload/file/42887253432.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab90c001d---tudatawewekotit.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/75534155262.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9ad56074b4b790f0b90e06650c3f2be1/54472781386.pdf
    • http://andlupa.com/userfiles/file/wezav.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853bc5594a5---mejumadufekenipunode.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00b6b83f7---94709006464.pdf
    • http://naszymsladem.pl/upload/file/tabapugi.pdf
    • https://datajournonepal.org/files/13255136463.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a5494ad6---45706992632.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7df54f507---64259770923.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=4+pics+1+word+level+334+answer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca31.bin
233c70582bef51ab6e44ed1d646f94472e47914567d2143ba429541c22558ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA31 17012 bytes
font_01_sfnt_off0000f712.bin
bb5e09b725f05e60e120f644b04ac5f6c0503311549667d7d1a94190e2ced8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10768 bytes
font_02_sfnt_off00011016.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 16792 bytes

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