Malicious PDF — malware analysis report

Static analysis result for SHA-256 614e52587d12289b…

MALICIOUS

PDF

81.3 KB Created: 2021-09-02 01:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1117f42de3af74ac77307c37a1c9f6ce SHA-1: 9dd8ba0f732e3f49a459cfd39fd3f15be1381b93 SHA-256: 614e52587d12289b8892f3ee7d640e1c2f741ace0381450cb429e8cc962bae4f
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=install+all+tools+in+kali+linux PDF link annotation
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/lmi6087dnhagdr4qfgmc9bsco2/fobek.pdfIn PDF document text
    • http://yuli-china.ru/d/files/6109197728.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/zirugasexejoxanip.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/webawusam.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/geluridakelezulosamunulor.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/famogopemimajujakiv.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/547p8o6630hdk6cossum2534u5/59218410181.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/zekovuzusimobol.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/62ikh8d43i5i2ur2tr51e1fvbh/fedijegadomiliroxipu.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/22f91940acebed2ce8d1546a38d5a5b2/tofapanuwawironuranilu.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c315da27756---50237796210.pdfIn PDF document text
    • https://soechi.net/userfiles/file/kimemufurizoluxisexujux.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/jizogabisanipopekef.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9d63928d---60727894347.pdfIn PDF document text
    • https://maviet.vn/upload/files/61305881076.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/lakudowijokolosedadade.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/34tmss9hcftpphe45fkk713l84/lujodavezuwudasebibirawiw.pdfIn PDF document text
    • https://doganagolosa.it/file/gowedadupen.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/54060845466.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/76781035832.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c01633533---nimakaliraji.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/sc5p7e0j10ghur8nmpjn8mkdn2/vowik.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_off0000d0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D2 10112 bytes
SHA-256: 958c6988ae9f8ee8d5e7486c901c06bc9606afe3ccee934eff7a886c45db774c
font_01_sfnt_off0000e783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF95 21832 bytes
SHA-256: 0eec5aaeddd2b3cecdd8682b6fe9e81e967ed538c01be6dafb16874dfac43b30

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