Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf02fd77310bad7…

MALICIOUS

PDF

83.4 KB Created: 2021-09-09 15:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d870bc5b776406e5a378c3cc99ed9126 SHA-1: e2315a405ca32df7e668335c76db5bd0299c9471 SHA-256: 2bf02fd77310bad78d8faa614fa5febc974e98765e551ce5413e1941102cbcb5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://rowadalbyt.com/userfiles/files/90688556762.pdf In PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136de187d231---73029608844.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/faser.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/85312211857.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/89725532757.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/jaxexigugelumozigikifo.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/67830252989.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/89236318710.pdfIn PDF document text
    • http://metzlerranch.com/userimages/24532944401.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210905152219.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/9815706920.pdfIn PDF document text
    • http://co-mit.com/uploads/files/mupusefogarufevaziru.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/79980551318.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/48820707811.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613969cccb3b5---nefuzojukisajozawajelogup.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161386f983e414---koder.pdfIn PDF document text
    • https://olterus.org/contents/files/10311578140.pdfIn PDF document text
    • https://msiutilities.net/documents/54364603549.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fcc75787a---32824459782.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/ea29706ba27b4e52a2f2d04aa147ba29/fawunasuwijelinoru.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/diwinapoberagizamajuza.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/damepazizixupaji.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/wetavara.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/96323220485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+your+phone+a+gamepad+for+pcPDF 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_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 11144 bytes
SHA-256: ec79eba05eeb57e13f80c20778fa572be04e03cf45a0b6b06c88e6e9c48899d2
font_01_sfnt_off0000f6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 18788 bytes
SHA-256: 0bc0fcda52d494c2d60e40308a1072fde1a46858b2394727c3305734d45729c2
font_02_sfnt_off000127b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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