Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1e7027c0a219b9…

MALICIOUS

PDF

92.5 KB Created: 2021-07-02 04:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c6577b6e56a9b0a4849fb7fbebc37bb8 SHA-1: cc8f8133dcfa69e7e682731676c140f2d72827b2 SHA-256: ce1e7027c0a219b9b4247773a979e04ab757d68ed2c1e90946cf2d977a351865
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, leveraging the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=chicken+and+broccoli+crescent+ring PDF link annotation
    • https://capecoralliving.com/media/file/85045480509.pdfIn PDF document text
    • https://egf.tw/test2/images/file/28501159914.pdfIn PDF document text
    • http://12shio5.com/contents//files/vojiwamis.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/88e3f57cae6ada338fc25dded4fc940e/newubopavakamopofamab.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e9e9627564330925baafa6a023f8c11e/wiwonamenu.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/repanujelar.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/jevizekopigodetikemo.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/f88a46b108c523888d26b9f6b7d87ee2/69538264946.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d29617afc---22528896631.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/255517c2d186bbd94986f80984264d6c/lidibomul.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/08c365cb46604719c0c5284cb31457ff/lidumojakufobe.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/57647454292.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/24784941627.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/norupipalutonaver.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160952ad046d45---tikuf.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/156e6d1c518fc860f3d1bae81b3bdae5/744022763.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/58301e0985984c34d1759ee6379537d4/14219522291.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608882908391c---degofutojonenowesenusadab.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/vdfju4gbv2bj33aunkgv0luq55/19659220726.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a04136ebc13---kinatiketedidukakikerek.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/zobovimurafaso.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090eb8b81c06---murawije.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c435be2ff3---91868418089.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/65593874890.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff471c2774---webupepiposiwozis.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16097d10336f9a---gekebuluna.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_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 10912 bytes
SHA-256: cc3589c7d27e9ea8c8b76db2ef651453b5dacd8d75810553aa108a4e3d4b1b4c
font_01_sfnt_off00011a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 19280 bytes
SHA-256: f5420e32b41fb96ed49a31bc58f5f989e2963b37c0a7721eb9983bfe55bb5434