Malicious PDF — malware analysis report

Static analysis result for SHA-256 235ede7023a9293f…

MALICIOUS

PDF

87.8 KB Created: 2021-09-07 04:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9901bb1fd90b0e0c66674c1563b82458 SHA-1: 69496f5e0c4109c41718c19e8c0a8e247f563cb0 SHA-256: 235ede7023a9293f8a44cbd061bfcda91a933718c2d461f4e6c1fdd139e24b0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The 'dangers of alcohol abuse' lure in one URL is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://stollerco.com/testingsites/advantage_aviation/assets/media/file/mapapimu.pdf In PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/7jcvp9a25qgnb8b0hqotdauhf7/biribozufutemubepesor.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c39e185a---pavuluv.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b2e393837---rokijesumekiruvazixure.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/85608000427.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f3ff3c3013---18616690422.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/15667333743.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c88fe451138fe8b6e4359c760a62c977/xopuwakumexuregabisodeset.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/megerajuniripik.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/74724351315.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/berorimopefirakuronutumil.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d72bdf0a7---87992847558.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bbfc8554cb93702e627397ec67d74552/zutelebabiro.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe36660650---85904688135.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a09ae6c4---gakulunaditip.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f82d19e72---71929861399.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/5d06ab01e845a09bce7fff8650c3977c/51191360718.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/5e9c0f20ed248fc6a2c79b04e48ecebf/98283781603.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/072d0e9902d053319f3850f901eac856/6257299310.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/83280412674.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/58a042379e34e42d329814b8bde9af37/kizorixuwivazine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=dangers+of+alcohol+abuse+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129bb166eb10---54488715539.pdfIn PDF document text
    • 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_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 10952 bytes
SHA-256: e5453d7414ace0e20014e08f8f07009daa8d278161546a71319aa32b30ab5c1d
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 18348 bytes
SHA-256: d19ee943aef063bd4b8ed7c8c80ba3a6a32cbacea2332cc8c82e6f8b66969bae
font_02_sfnt_off000139e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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