Malicious PDF — malware analysis report

Static analysis result for SHA-256 decfda93680e48ff…

MALICIOUS

PDF

84.2 KB Created: 2021-07-07 17:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 13a738f0fc38796325873ab2fe383dec SHA-1: ad7105d3438d962b31864edab0532c4da93cfc04 SHA-256: decfda93680e48ff3d0ed535356cb3292ee7849e6a0e93b8c27aa415da739fac
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 CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this as a phishing trojan, and ML classification strongly supports maliciousness. The embedded links suggest an attempt to lure users to malicious sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://camionespanamericana.com/userfiles/file/vedaruvuf.pdf In PDF document text
    • http://anandtouristcorporation.com/uploads/zexifebemivafexamenifug.pdfIn PDF document text
    • http://cmepta.com/clients/7/74/74ea2f63c40943e6497cbf70acaf7c81/File/99457148432.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/3312683579.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/9jdassbt4c1getu6todllstpi5/93035859889.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/pefofox.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/voruwojeribadigo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099224c227cc---84612834485.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b7e2cfa6a7c225ef15de060488934551/4509084638.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/42237528098.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6563bf8a0---84042294652.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d9ff669d92ef9724ced83e67356a3bac/25935698778.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccc14cfbac---88883608440.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f2832b93f---16273374586.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160701e686d951---wisolalides.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/boranodo.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/jt839ksmnpk5s0q43ae43gl942/riwozalevipidubimizilo.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/pedulilapavesubukipisafe.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210518172948.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/140b97a95788b5b7572075ad3205ddfd/76043418140.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/87027844560cfc782c8ea6.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/660es91dvnvvsubcbncpjfhug1/kixiramopife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=figure+drawing+design+and+invention+ebookPDF 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_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 17240 bytes
SHA-256: 54dfa9e01e17aae5f89cd50bcc11b8aede46f983a0d599df56805365a259bf0f
font_01_sfnt_off000112a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 10840 bytes
SHA-256: df09218b78e7a6dca95447bdaf62bb18028859e2e49301efe7c2ad39e69257ea

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