Malicious PDF — malware analysis report

Static analysis result for SHA-256 964d09f8e7c21284…

MALICIOUS

PDF

103.2 KB Created: 2021-07-13 23:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c6a474aef02c66f3849d61dd4d96beb6 SHA-1: 1498386cc0821720f191d2075a8e6a7d61113a1f SHA-256: 964d09f8e7c21284df992596ef2822836c98d47a66d0f8012800c2553caab83f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of multiple external links and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://accesoriosalmayor.com/images/userfiles/file/60552447132.pdf In PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160833736b2c69---4556960332.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf292b6252d---dixixuwo.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/79812945890.pdfIn PDF document text
    • https://mmszke.hu/files/file/11323524083.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fodor.pdfIn PDF document text
    • http://cbwmd.com/uploads/Files/17228855904.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/japifaxegorobisijorurajet.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/u2ij2gim4hjt3labhf4lhlq1i8/rexovizozaxigin.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/77ecd4141716c019234ab1a7f88cc9c2/dupefekenusijakat.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/77871534646.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fc810ee679f546412b640af440ed238b/vanejoz.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/e0oipl530ctflvrlmpgros8d30/71238605643.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/cfer2u8j2e0578nll4s4ur3lsl/15830366240.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/l97tqvad2re3rqki2k0bj8da80/23123396834.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/45304539049.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rq81qiqnet2d58bdt4ffu2ai6m/60909614024.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/96655063874.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8db955525---7199602122.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1s3t9h2k72d3ba4fbds3dqrljn/46499996542.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833a68b9b19---bokemoturolibikivaru.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f306e84552---tejinibubunifa.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806fefdd850---mozolikokusenakopideritog.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fufikigufiwubezij.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/xijinirej.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/gegufemobebasijujukowane.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c2e5dd21a---83827696701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=swat+4+the+stetchkov+syndicate+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012e01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E01 17492 bytes
SHA-256: 61b38a0f1425e170c41c6c2237164d227be380a73805ba83c5b76a5382ff733a
font_00_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 11084 bytes
SHA-256: 34791384c4e8b5c438101988db9d0d98d4d526429f053cc114c5efcecd8f3b4a
font_02_sfnt_off00014803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14803 17608 bytes
SHA-256: a9e4cad320b8bada09c9aaf2605bb15d56d4e825d411f94e8d8a2fc4c31081e6
font_03_sfnt_off0001765b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1765B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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