Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebe033a3e26509b…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 13:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2311912ebef26c024c17543f9a2b0f87 SHA-1: eb7a5371c07c9aa6e6e520b2934fc9dbdc75239d SHA-256: 7ebe033a3e26509bc8f8682be85e9aac27bea798cf8755e62c14c7fb98c0bf6e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a link farm used for distributing malicious content or phishing. While no scripts were explicitly extracted, the presence of numerous unknown URLs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bhavalaya.org/ckfinder/userfiles/files/79968711472.pdf In PDF document text
    • http://ros-audit.com/i/up/file/83289783591.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210902_023FC591B0272F16.pdfIn PDF document text
    • http://servmed.net/userfiles/file/degolixo.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/wonepusaziseri.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210903062107.pdfIn PDF document text
    • http://apex-architect.ru/images/file/welojerofepibof.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/gejixixamenavorakinaseb.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/jizegavifojosiwoj.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/xeroxut.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132519dc8f38---zifidobo.pdfIn PDF document text
    • http://full814.com/upload/files/94118790927.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/jasatok.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/gudodivulawetonidag.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/bedexomorose.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/damjt22dnkqh57ph93toi7fmcc/65395894412.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/42620028066.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/bevom.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/kakudokasonaluxa.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/20638451326.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/mopetatorezodizil.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/wafagivikoguwobanuwit.pdfIn PDF document text
    • http://finchamauto.com/pics/54325761128.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/lusupexoburolimum.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/69962619798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=malayalam+moral+stories+pdf+free+downloadPDF 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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 18980 bytes
SHA-256: 87d745d540850675b4ae4ae0aab6737925f49773b03efe7673daac7e4b799bbb
font_01_sfnt_off00010a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 10852 bytes
SHA-256: 508e85ac347ebd82c729fad3753c86960e5ac3d59afb398e85fc2ba84b4e3d0c