Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8d9cc5e3cc98b1…

MALICIOUS

PDF

95.5 KB Created: 2021-10-26 15:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e651cbe7533ae34392748f352158df79 SHA-1: 1938ceabcfce717f69efc88d3b3158a702d8b25a SHA-256: ab8d9cc5e3cc98b14e06032371f02542a30846a23399de0451b7ef133b3e89ae
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 phishing or trojan distribution attempt. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting an effort to obscure the final malicious destination. No scripts were extracted, but the overall structure and heuristic firings point towards a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16159493771ad2---diwexipazor.pdf In PDF document text
    • https://borsalino.ro/imagini_ws/573760026.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/60580124751.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/21144749342.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/22176042431.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/12955162657.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/7745550198.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/15311677103.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/pixolutajaboxumujosiv.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210928_FF6738A4C0DBEC2F.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/nejasububetevudelev.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/wikabuxudidoxeguj.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/lafuvoxuxipofukisidabab.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328e9667ad3---rikim.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/36478995251.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/5090167769.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/88329779876.pdfIn PDF document text
    • http://biggedefense.com/userfiles/file/lazegobutefefegarivilelud.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/48189268528.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/forofiritulokukovepuzitow.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20211025_0C424202B9277025.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/95946264594.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/refoxokefoxisekeru.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HKUGBsJGI0E/uplcv?utm_term=emily+dickinson+the+brain+is+wider+than+the+skyPDF 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_off00010f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001271f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 11052 bytes
SHA-256: aa27234ff3d98fdc7860ebc8c863c002e55e7b38158aa2d1b8c2128fca53b07a
font_02_sfnt_off000140aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AA 18256 bytes
SHA-256: bad764526cbf1d8b703856f47294ad27cb1f8602a8a13975d3f0b2d8ed8c121e

Open this report in the interactive analyzer, or submit your own file for analysis.