Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98e064266e162a6…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 17:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a9bb1d77356f690df2412352c8d28727 SHA-1: 1fc3b205bccaf77a320376ef1cc0dbb099fb7c3f SHA-256: f98e064266e162a60f786d0ef588ac7054adfc3e647471dc6b2505d4b3f9ac89
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=what+are+elements+of+cultural+landscape PDF link annotation
    • http://tevopose.66ghz.com/62334088898.pdfIn PDF document text
    • http://thecet.xyz/91028958664nqryn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369187/normal_5feb71352ba1a.pdfIn PDF document text
    • http://kpovli.ru/15420529173c19dj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393898/normal_5ff4a21817f02.pdfIn PDF document text
    • http://gexulogoben.sportsontheweb.net/92878853862.pdfIn PDF document text
    • http://theplafond.xyz/sharepoint_2013_workflows_stopped_working2ji2z.pdfIn PDF document text
    • http://diranujuwi.iblogger.org/hip_adductor_strengthening_exercises.pdfIn PDF document text
    • http://boketizabujig.scienceontheweb.net/archetype_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_6037ef32e9aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_604200c374c84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jukikusikodopom.epizy.com/tofixejuzudajinoges.pdfIn PDF document text
    • http://pebuvika.rf.gd/52934183653.pdfIn PDF document text
    • http://merawaboz.epizy.com/35675984530.pdfIn PDF document text
    • http://tafinefonekon.rf.gd/16._4_helping_verbs_practice_1_answers.pdfIn PDF document text
    • http://losirerosusakaf.rf.gd/annalen_der_physik_english.pdfIn PDF document text
    • http://nuduguzafasu.rf.gd/free_twitter_for_android_phone.pdfIn PDF document text
    • http://ligesetuvijaga.epizy.com/gst_full_information_in_gujarati.pdfIn PDF document text
    • http://durunorutap.epizy.com/forgery_and_counterfeiting_act_1981_sentencing_guidelines.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 5408 bytes
SHA-256: 3b79edc7990a476f2f7cffb430f5661ce1cbfe94da4b9ea2b6642c647aafe3f5
font_01_sfnt_off0000f517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 10736 bytes
SHA-256: 0daf42b7598d4566162587b8da05be1ffb47c09585bf42fb7776363ea3e5d838