Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95b2f88c2c76e03…

MALICIOUS

PDF

76.3 KB Created: 2021-03-04 00:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 54361c02bf6703fdddc7b10c7466187f SHA-1: 90b9bcb6641b072398914f9b74e4b306ea23e2d2 SHA-256: b95b2f88c2c76e03076e6a68bac84661c5eb5303342eb196edee8512744d8d16
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. One prominent URL, 'https://xezojetit.ru/wix?keyword=happy+wheels+2+kizi', suggests a phishing lure related to a popular game. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://xezojetit.ru/wix?keyword=happy+wheels+2+kizi PDF link annotation
    • http://ourfutures.space/webexavixuvufizupafuxaxhd8s0.pdfIn PDF document text
    • http://limons.space/chris_hemsworth_workout_planay180.pdfIn PDF document text
    • http://iranomics.com/gobiwijarerobozizakupitepni4mr.pdfIn PDF document text
    • http://gulenapirexapo.iblogger.org/jeep_cherokee_repair_costs.pdfIn PDF document text
    • http://dinusedixiwog.iblogger.org/scientific_calculator_apk_casio.pdfIn PDF document text
    • http://xasujaru.22web.org/tuvokimubij.pdfIn PDF document text
    • http://timurberg.ru/74450891529utehx.pdfIn PDF document text
    • http://fupomogusi.22web.org/weather_report_for_tulum_mexico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegiseko.epizy.com/nozigilakajogavun.pdfIn PDF document text
    • http://pikiregofi.epizy.com/smedley_butler_war_is_a_racket.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/exercises_on_relative_clauses_with_answers.pdfIn PDF document text
    • http://vusemedes.epizy.com/binomial_theorem_examples_with_square_roots.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/n64_emulator_android_bluetooth_controller.pdfIn PDF document text
    • http://lusavudipanu.epizy.com/3530981653.pdfIn PDF document text
    • http://bixasejefo.rf.gd/52869783980.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/lofusinibowa.pdfIn PDF document text
    • http://bosurigazo.epizy.com/87613193718.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_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5212 bytes
SHA-256: e04b86724e377cce2bda71a0befff2bcf03b698c5ded90b71c0c0bc8c3d0783d
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 12256 bytes
SHA-256: 7978d091658b99c65cab3ddd409503d99ea1ca0f67758916a5d2b34c49319c9e

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