Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7ea34c6c499e2b…

MALICIOUS

PDF

77.9 KB Created: 2021-09-04 04:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7313514a13a621969b482f32ebb88b63 SHA-1: 645bb3b2c3450b5cbf60f544a852f1654ca62007 SHA-256: 2f7ea34c6c499e2be3d92bb0942c1cc1424ebd045b65c8dc73ca23454187c9df
176 Risk Score

Malware Insights

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

The PDF contains multiple links to potentially compromised websites and is flagged by ClamAV as a phishing trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number for a fake support or billing issue, a common tactic in callback phishing. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 7

  • 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.
  • 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 https://syteq-pro.com/userfiles/file/tivifoxejom.pdf In PDF document text
    • http://www.aadhar-interior.com/userfiles/file/pavatiminuzezopafu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/c0d6s7nsmdu0lm9cp6501n8eco/defokibemitukadagubotug.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/21521481743.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/53020937255.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/disebolatinilewata.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/1f69bf320073881c3c58117530ff3928/46615813027.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/21997441470.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/4576746317.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d222fe123c---90400638246.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/jizaluwenesubizeleg.pdfIn PDF document text
    • http://dominoliberec.eu/images/file/files/15710388155.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb07dc24d5---wekalalosusosivokixurumow.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/830bbd6099e9f75ca04194b31b41607e/popepalibijogexazisemave.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/44a44431ad2af6127fa527dd440b4093/24758940097.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161094e3db9a58---rumosapivilo.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/33705064476.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd29e9a59---tatuzipalaxinekojak.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/84204842195.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/41301e4f83eeed3bf52d0802589f3fc9/taguvitujodufarolituf.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fffba342c6---zujigemu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d049c111dd---gopew.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/59655039216.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/bstqarhff1r2e5apijhs9qr8jp/59646861976.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/jubufuzisemif.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1fc308d3---17472079534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=4+digit+subtraction+across+zeros+worksheetsPDF 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_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 11064 bytes
SHA-256: 6bd6a05b827bdacdf4cf9de92359ea1429259574ce06c37b80058a550bbeb628
font_01_sfnt_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 16972 bytes
SHA-256: c8fe185aaf5a899ab3c2e73957c3531a04ae22f661ef0dfd0f4259829f06cb84

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