Malicious PDF — malware analysis report

Static analysis result for SHA-256 11be807c4ecdac34…

MALICIOUS

PDF

68.6 KB Created: 2021-10-03 19:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ec3c7e7abb29ff8004979c8114c6a633 SHA-1: 15185c73e10fa1f43452a623587c6deee4d2d137 SHA-256: 11be807c4ecdac34b49b67e296526897a9acc43264cb7d058a2614efd68a5dba
176 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, as indicated by the 'PDF_IMAGE_LURE' heuristic and the presence of numerous external URIs. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=acceptance+and+commitment+therapy+worksheets+pdf PDF link annotation
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c19ed620ca---dexugizotuwodowigatubudox.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/614feaeb69bd5.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16146b7f535128---wetibexuzowimepam.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/01076tedqkcpbuarsdns57ad6a/fananegosevudopan.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/79128964159.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/bigupejuromekilirejepe.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75b7b3e1b345f3d29e7e44196e391856/jubugore.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vb6rv83966ipkiu3a2m91ffjn3/5990408498.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/dipugabubat.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/guriruwota.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/towapijimajisizen.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/868794cf7f40ef0b430d2e10f6e020ce/zawazu.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/lerojoje.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/27/file/zowufinab.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/481a94b89tva5hutij8r7id877/7694179803.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/65778015159.pdfIn PDF document text
    • https://fond.ru/userfiles/file/jenuj.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/16441332588.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/45598111466.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/30186633068.pdfIn PDF document text
    • http://sdds.be/userfiles/file/33578278727.pdfIn PDF document text
    • https://dernek.daynexdemo.tk/upload/ckfinder/files/tezetewosovinageworuwomu.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/xuruzoxoxeki.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_off0000afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCF 11112 bytes
SHA-256: bf7f14e056905de85d9c95c2ce6663444cf22bf3eb8c9f670cff68910c436d70
font_01_sfnt_off0000c9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 14080 bytes
SHA-256: a81043cf6e8a9f97339afa89f4da2f2bf8eb9a99ab2db99a7b8f7387c2b1f0dd
font_02_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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