Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ba0ac821c83fc5…

MALICIOUS

PDF

76.5 KB Created: 2021-09-10 07:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a2af5d2d98c36f13fef1fe1a23742f4f SHA-1: 67a149665e53b6f02f724f469adb054dabd52313 SHA-256: e0ba0ac821c83fc544c09cbe4a94cc16c5febfd3d034352590c5cccfa5346898
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and the link farm structure point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://naturestuff.nl/siteimages/file/jofem.pdf In PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/48262058359.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/95786749819.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/pezujaz.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/pogusazowo.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/xebetozibaf.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/68615565146.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/wanimezuwonebomenovim.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/07/pululinoramuzikiwevu.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/lidatifumomubavito.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/22287895515.pdfIn PDF document text
    • http://e-sheremet.com/img/fezebunedojepunejew.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8b7e517402a07a8462a59849090b9703/jitupig.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/29832196038.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/68282548931.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/gobakeminewijanaluzabob.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/lanijofowibofolalesazo.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/24032531490.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/kivawibugabalala.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/35210093837.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366de77d4fd---jejanoxevaregefisoxube.pdfIn PDF document text
    • http://medica-brno.com/files/fisanopovozuxasemer.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/91165171859.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/97091995568.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/306303581.pdfIn PDF document text
    • http://salkim.com/userfiles/file/fevinoxix.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/73073264836.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/xofotugivego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=grow+old+with+you+the+wedding+singer+lyricsPDF 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_off0000c502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC502 10828 bytes
SHA-256: 009e42754b1ad6f0d3a460fd47c33de6c3eef659c747911134e5435bf2184eb1
font_01_sfnt_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 17824 bytes
SHA-256: 608b459e41e940470a6b9f22383b3356177e6ac0fea03d777d43ccef9f960872