Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49e082238dbeb4f…

MALICIOUS

PDF

88.8 KB Created: 2021-06-30 02:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c665fdc178b2643121b0968d49444ff5 SHA-1: 83daeb047600a58e03a9944111b6b7a51e934859 SHA-256: f49e082238dbeb4fbc35ca8061bfc86d70af3be6badb0ebe252260b455fac914
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous disposable domains and compromised CMS uploads, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amphorabeautyclub.com/campannas/file/padatujifelalitunexifit.pdf In PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/203c4d193e6dcb837695a7df0648c018/lapumuguzojenemasi.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/mk97ulqkpi5ur1l6215iq8v88f/fajopibabe.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084e7d82ac05---lipebujo.pdfIn PDF document text
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/jukiwadozomexixofofapajak.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/xebew.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/98975770059.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae6a3ad08a---radikutapowofopijimawagi.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1622183585.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a97e2738813---34223056699.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/runasuwasabipidipekemuku.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/18404384473.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/nagosixe.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/91793963809.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee73e42e27---23425493279.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ucotr68sn4s0euhvjak4hg0as6/73095216216.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/xilifubugodo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/bufilexurusoduxik.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/aa28e9afda2f8f68576b817a309463a2/gilutakidelaguxukowosas.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/1l2fn6jvi5bhcaa0laiv4sda03/wuliwefe.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae95563adba---68978707483.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c8eeb67f---18739704004.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/45ad02db3b2690857cc19f6eeb24d2ba/11962127827.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/muzitiwesativagexejezi.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160785beab45d7---kufopake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=martin+luther+king+jr+speech+i+have+a+dream+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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 16964 bytes
SHA-256: 87ccee6b78f09f89d7deaa711c692a1861d536f5ea02e4cb34c3d1ccac51efe5
font_01_sfnt_off00012387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12387 11328 bytes
SHA-256: 91598e7fa2991e1d693c8acc169f9e46216bb00972eb8a3dc2106e86d0b31724
font_02_sfnt_off00013dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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