Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed0204375df2e95…

MALICIOUS

PDF

81.9 KB Created: 2021-08-25 07:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ed63a3b0ff86072c384f7f00caa33a51 SHA-1: 90145deb98b9e5c08a0c70fe3b73b364c755c422 SHA-256: 2ed0204375df2e95dc650a7213cb167dd02bb73ec09cfcdac6c14ba74897b7c1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous links pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the download and execution of a secondary payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3f12d4b8---rovuzitajililozetowip.pdf In PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/11432696226.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2eed1458a2ce59ec03a595a99fcc8fd0/39639585103.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/70351040069.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a2de02e8d906af2309ef7d897ea4da1a/27142790381.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/gb4esgrvud1shentn403u2btaj/kapesorezirarubike.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd4acc96f---94626200568.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/zixikazivopil.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160870b9e80f33---nawobedakawonurob.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/62426623388.pdfIn PDF document text
    • https://churchboys.org/userfiles/files/zigudujasogi.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5ac857fe63dd23a5c45684911ef34782/juroxuvepanikitimixo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69442320ec---jabaxurawoligebawatevega.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33b22f32cb---gopofoxa.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/51ed7953e58fe2ff29a27baeb07e30e2/47524750160.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160779aedb524e---pefonobosoz.pdfIn PDF document text
    • http://clintonseniorhighclassof77.com/clients/e/ec/ec6cde7faca09d53f5ba1fe44cd32e38/File/89454856662.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6748970e9b---5490807313.pdfIn PDF document text
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/susot.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/538c95d095798cab3b35f09e35cacdbb/70797140511.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/ccf62624662605d3de8e2f80fe2ef1b3/kinedimokutonazeburisu.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9a079a88f2d22600f754c8b6f1606a34/86595872842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=anagram+of+nailPDF 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_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 10140 bytes
SHA-256: 89cd524dcb13452c0a6418fc10c7a2a88042b17473c5f42ef2df61b51cb29a66
font_01_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 16460 bytes
SHA-256: 9b28da927d88074042fdfb39524e1a332f3aa63f59c062c2b10c85a1930786f2