Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2fce7070ad6d41…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 09:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 162953301c7f5656471fac2a61f8f986 SHA-1: c9210dc75933d48e4eccf7fb14ad0bb2de1b84bf SHA-256: 2d2fce7070ad6d415ff279f706f55c968af21b5c5179fdca080d6e37884e0877
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to PDF files hosted on various domains, indicating a link farm or content distribution network. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the link farm hypothesis. While no scripts were explicitly extracted, the nature of PDF exploitation often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pastoret.it/userfiles/files/kitarasitixeri.pdf In PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/794495751.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210912182235.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/52501373126.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/62019203172.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/32978324364.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/18074937607.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/xanoparixalarimo.pdfIn PDF document text
    • http://shahgrp.com/uploads/47230897591.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/21900400325.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/9154876454.pdfIn PDF document text
    • https://g-stampo.com/pics/pages/file/70276664497.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/lanarisuwelisemisagiruw.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/97292429298.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/mamakozatibibitumof.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/wasafizitokizapupukovop.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/85020858661.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/zuvujelolepewomazuju.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/48216390719.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/69079712049.pdfIn PDF document text
    • http://herve-coiffure.ci/files/wopobazobaginisorerebuno.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/ropafidu.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/13174434685.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091018104821268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=realidades+1+practice+workbook+pdfPDF 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_off0000aeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAF 15504 bytes
SHA-256: de73e47b5e52eb187d6e37340c80fff5c9573d21acdcf27d5373b567042d7153
font_01_sfnt_off0000d603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 10924 bytes
SHA-256: 22dfd4f78f7679c464755f56145d35d83fd88f1e2c47d6a7b2f4d4334320d3a8

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