Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27ec70fa2b11f98…

MALICIOUS

PDF

210.0 KB Created: 2021-08-02 05:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fabec1f4e5336572feadc6a04549a2d3 SHA-1: 2b8617aef3634c7abec3f1a14919d2698db2783b SHA-256: e27ec70fa2b11f98683ac7a5c6590cfee1fb4694b0a4b8a9964a92370ac134ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8572

Heuristics 5

  • 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.
  • 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://uleiuri.ro/userfiles/file/jiwewufezilufaxiwed.pdf In PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb70fb89c8---46673507872.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cbde8c68c---11280663901.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa064cb55---60961427576.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a74008073b---xonevefuwiwexezoxefetuj.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/nunudatidepakoguparip.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jovepabadivusoridagunexo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2a7a6cc9b599665a57c3af84553d3973/35775933327.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/fuxerejigav.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/iva5s69033toak63a3e9m0hqgr/mulixenidoliwoxuk.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/rezaseguditetudiwamiga.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/moreremotod.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/kuporufaxafujodawunal.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/8653421841.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/63223675919.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/41486121684.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1bfddb5b4---93941853370.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/nisajikom.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094da09adbaa---32274314248.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8de7250b0---tiliwa.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/40906943069.pdfIn PDF document text
    • http://grabnerestriche.at/tareboluvavaweru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sda+zulu+hymn+book+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B44F 21344 bytes
SHA-256: 91056b6d52175359db4428a2b78982c9ec8db19ff32ef1409f7aa263b9e8e182
font_01_sfnt_off0002e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9C7 10592 bytes
SHA-256: ee0edda5825eb4abdf5a7a4c817133fab07130b56eab915bcd41664d5b53afc9
font_02_sfnt_off000301d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301D9 18844 bytes
SHA-256: d3aa54da0da8143f1ab83ebaa3bbe19e466759f732fdd5d60d100e0042e53369
font_03_sfnt_off00032093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1