Malicious PDF — malware analysis report

Static analysis result for SHA-256 9150ed2e93dbfbc7…

MALICIOUS

PDF

69.4 KB Created: 2021-09-25 07:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cc1cca810c9570cb990ea80db93dd543 SHA-1: c16506b2d3e6b9238f3c2e7b5b65baed9f991b69 SHA-256: 9150ed2e93dbfbc7117246af9e9b14a0358292a60bdeda18696028cfef5eee0a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, including a small file size and an image-only appearance designed to hide clickable links. The embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 8

  • 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 1 text block(s), carries a click-outward action, and is only 69 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.
  • 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 https://mlbcsimleague.com/ckfinder/userfiles/files/88387015450.pdf In PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/lawozutemotiwosevomifeni.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/visijakek.pdfIn PDF document text
    • https://combrooncom.com/contents/files/ralaz.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/pufepus.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/17281938749.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/vubejamosefutoji.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/19984292383.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/91577441989.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/431deb1983847828c3bb0e320e388833/gipujono.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/50283857935.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142858d56c34---84922360736.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109092247359926.pdfIn PDF document text
    • https://dm288.rs/slicice/file/4356764226.pdfIn PDF document text
    • http://ombs.ru/uploads/files/57916566901.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/jojipogapu.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/32352389081.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210917070644.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/39082039990.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/dipubovoxutisobideb.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/28097641990.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/21593045504.pdfIn PDF document text
    • https://chineseclothingonline.com/File/gowofuluvudadatoz.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/39311276624.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7a3bbd98---86886481068.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/beruronutemokonule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=manifest+season+1+episode+1PDF 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_off0000b468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB468 14448 bytes
SHA-256: bd0ac532ab178b6d993d7d12f5e5e1b098d1a1264bae29accb31e997eeaaac4a
font_01_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 10392 bytes
SHA-256: 2ed6e0529f15c2fddbd37300a920a26917ca8c2de481b0d313f1f044229d06a9