Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ece265e0619b284…

MALICIOUS

PDF

70.4 KB Created: 2021-09-28 01:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: df7142a589bca8fd72416aa4fd9b5d67 SHA-1: b75d1cfef7cd1a4e240e7a8a519624701a214849 SHA-256: 3ece265e0619b2842f37720b7865af8f06f18a693dd0a7e8d341acbed4878a09
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure and embedded URLs point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://agrostroi-proekt.ru/ckfinder/userfiles/files/jajire.pdf In PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/43963530147.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/caa507c44a286a13fd76a12778f57eb8/65972259539.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161430b13e3038---zenewisotajibesumegaguzum.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161500aeaa0e30---87846371513.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/tedulop.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/belinotajijeluzonuxejan.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/kopilibokoxojaz.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/livelivexi.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/depidimazekeju.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/df0afd326d0b9c26e48be9d448c1add9/gakimunevipezatojipom.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614175a9015c4---femanonimefu.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/zupizajofetal.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/topogijikebexozapazo.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/pibanelagobowev.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/gijadivakipewosile.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/22424952809.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/gijopozuko.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/tomiramudeduzudamimapejed.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/ginizukopisudufodawomuve.pdfIn PDF document text
    • http://qdjshg.com/files/file/43810427406.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/29567606672.pdfIn PDF document text
    • http://canadianrockies.info/files/file/36674023447.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/mibaxedijum.pdfIn PDF document text
    • http://c-amc.com/upload/files/23137518323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=no+recoil+pubg+hackPDF 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_off0000b4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B8 15500 bytes
SHA-256: f37b378b205a2f58f77a7c268854f44d6fbbd889b2d57a004e6f6b2deb90180b
font_01_sfnt_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 10592 bytes
SHA-256: 15adc1a84f40abc595bb40e792cd2fe1f3be49742941421e3488df49fa912ab4
font_02_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1