Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e024ec8c21c219…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 09:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ee9df756dc2b953302927be0c438042 SHA-1: 386f47af7eb30178e7563622b126eaf1a4ef4401 SHA-256: 47e024ec8c21c21943afe3f510e5163c422782a45fa0ee66de5eba50e61eb9a0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic indicate a phishing or scam attempt, likely to trick users into visiting a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a66f5c5aa2---pulidilitadaxeduk.pdf In PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/jalomomibeju.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/53f807301410b1f9c08a986481faa8dd/gosupezawe.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/80070739414.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/00e8vcd6b5eufj2v87uki5ki04/93004476428.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/rajiviwipapow.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/r030j8r7k3okekb7q08pntblh7/6534780916.pdfIn PDF document text
    • https://electroagro.es/pub/files/gezuvu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/refilojogowog.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/tezaro.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/87859169626.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f973cdc8c---12462688695.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/nesusupu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/42df162f45e2cd8e723fbc66998b9430/32355902873.pdfIn PDF document text
    • http://ubest.ru/images/file/40662980786.pdfIn PDF document text
    • http://amdind.com/userfiles/file/sozutiwelixofopijele.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/somopununijawe.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/39585289826.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/82479209553.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/10276124119.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6e4d406dadae2c27970c95ff38cc0e1/vozej.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160749fc1c9e03---gelekaxakemugezojekibives.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/pivulonam.pdfIn PDF document text
    • http://jar-ted.pl/file/71615656113.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/14705555261.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af596714a1b---21304311408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=question+mark+sentences+worksheetPDF 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_off0000c939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 18128 bytes
SHA-256: 4505f8a63f8dfa08cf6f2a13781826447ccef3d96aa9b51e43626b5f125b0d3d
font_01_sfnt_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 10784 bytes
SHA-256: acdaf98d52d22a17cef495e8ad563b4648e0fd1aa2d19a7da0bb2db8030e8258
font_02_sfnt_off000110f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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