Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95ee642ad56dab1…

MALICIOUS

PDF

70.5 KB Created: 2021-10-02 13:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6129afbd839c4463f00c2eba434fbe23 SHA-1: f630c5ed526940d538999a6ec172b28ad8411592 SHA-256: f95ee642ad56dab1888ee1703b833c62acad2cfba92b2cc6c332ab02983bdaf1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely directing users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and the presence of many external URIs point towards a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://hattshopping.com/admin/assets/images/ckfiles/jujan.pdf In PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/pajopozujizigazidovosu.pdfIn PDF document text
    • https://limadelimon.com/images/file/bowenodadisofaxege.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/direvafefilotudo.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/lazodikovokijarutugine.pdfIn PDF document text
    • http://totoumi.jp/upload/file/82811841517.pdfIn PDF document text
    • http://normel.org/files/upload/file/komumasidabozijexixofe.pdfIn PDF document text
    • http://innotack.com/userfiles/files/10583226197.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/figupexuxerovarovaxuvit.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/sirututojirilemoriv.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/wogofisa.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/gipogeb.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/sagidegibaratiz.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/pinoralodosetozetasaduz.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/gedemexoroperejurap.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/juwez.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d81c2c22c912de30e86ac9f938e2c636/ranisuwazemunukawuw.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/47095819486.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/45733978570.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/zitij.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/24381312643.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/i6v0dgemovuv7j6cpd33mhm4i7/vibegijubivesososujijifa.pdfIn PDF document text
    • http://erictex.com/ufiles/files/10718218840.pdfIn PDF document text
    • http://texmet.pl/userimages/file/mibawesoz.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/22412449351.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/bejuxijenepitel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=indian+patent+lawPDF 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_off0000b55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD75 10036 bytes
SHA-256: 05a5becb2d4c7693c73d76d9ab51030fe0b2ba0881eea74e80a2ed7b83fef965
font_02_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 15972 bytes
SHA-256: 4d70a1a8aaba14c77ee7adb86ac27b459ab369811c25016ce2145af000fed068