Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec72e11b9c96718…

MALICIOUS

PDF

100.5 KB Created: 2021-07-17 07:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cb2cc3b90c099382a0209895576ed420 SHA-1: 9a1dae03aa90dd4ad000570f560b308f55a45bd4 SHA-256: fec72e11b9c9671884c4b204c53e10562ea6e96ab218b4f68948a04fefa9c331
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/mpnlnppsp9hb4fcc7i4imhrikm/89287519194.pdf In PDF document text
    • http://wecans.net/_UploadFile/Images/file/57967904590.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf09bdf00---gipegiwi.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6bd5d754ae3b285cf3e4f74028144ab1/44820538688.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/kb848lped2fbtojipoltttkl70/92895116525.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/mhnjos754h2odsfc1f7q3kt9d2/97098603391.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73dc6a5b2a---tizetikevugawofavekodugo.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60b7e51299---revowakirobagajosa.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/weliloj.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4cda7f943---guzame.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1e374d1d950d20bf02f0b578d2befb36/40210830864.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/67768069274.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210717_065949.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becfea1838a---27832853824.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/katoxe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160d95196ab0b0---goxofapomepipulogup.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607191f9d0f72---rudibamojuverex.pdfIn PDF document text
    • http://mp-journal.com/media/file/lupunepexusufegilujo.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/34089137221.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7cce2d97ee76c9366af270fe2edbf859/jazesefofabe.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3f8183b358008ac70c15d225b8effd00/38013422450.pdfIn PDF document text
    • http://usdcp.jp/user_data/userfiles/files/46950299072.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/93a30092290819a2df4247201219cb10/4740483852.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/8683411671.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/b50d6801e7c49945807397f3e8e04ea6/65426400719.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=first+class+degree+gpa+equivalentPDF 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_off000122d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D1 10860 bytes
SHA-256: 2dfd71eed5175fb38c4a3e7d36379a644d98792777d035aca4183d9e9960752e
font_01_sfnt_off00013b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B82 19136 bytes
SHA-256: a5e91825327f0a7d282619e8db2f1bb8dbfa52aaf2c36300b09bd027010e7d77
font_02_sfnt_off00016c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.