Malicious PDF — malware analysis report

Static analysis result for SHA-256 41182a55b06cb0fb…

MALICIOUS

PDF

67.7 KB Created: 2021-09-13 18:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45d92bf06bab6399b70f8b2f980de7ae SHA-1: 38b3fb795592203f0fdbbb961b6d543a9b96537a SHA-256: 41182a55b06cb0fb83b39d073d7907dba5a385de5ba484500dca1e1891099156
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The presence of a click-outward action and the ML classifier's high confidence score indicate malicious intent. The document likely aims to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=videoder+android+apk+download PDF link annotation
    • http://stimatacasa.eu/userfiles/files/wotujuxafubigub.pdfIn PDF document text
    • http://salt17.com/userfiles/files/daridinuvufobozozakowagot.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/5061738662.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/80354350572.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/64024850668.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210912233137.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139a548976da---rafazafotatuw.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/79358912980.pdfIn PDF document text
    • http://www.moyekolodin.com/files/xekar.pdfIn PDF document text
    • https://landi-bg.com/images/file/tepivinufiremekolo.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/lidedemunet.pdfIn PDF document text
    • http://corkpotters.com/images/mokamiwalolubawozoregaz.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210912_45947B8698AEF4B4.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/barekexi.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/29987026332.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/ponakamufodanenapoj.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/43654026046.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd05c05a06---73736370549.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/foxotozubogakisupivelenef.pdfIn PDF document text
    • http://gro-felix.si/uploads/visokizonagasafunazeloz.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/jubimes.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/poziwukapitipovenop.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/zuliworetov.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/090113032461.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_off0000af39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 14204 bytes
SHA-256: 84a4536d2525383cc0b5f3c763f080b1112ed3e3f8e00d1136167c14c8bae20c
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 10268 bytes
SHA-256: e36189e1b69fb070d71ef642e44fc7f7a370d926eb9e9d98f32774695a9361d9
font_02_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1