Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7f76dc645a236d…

MALICIOUS

PDF

127.2 KB Created: 2021-02-13 05:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f9bdf3fb926c9dc84f03405d35514518 SHA-1: 96093d4969f029b6f67b4db272150bc0085d859e SHA-256: 8e7f76dc645a236d89f13145fd0c14317304f231febd5ca643e631d6851458de
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'baarspo.ru' and containing a search term related to a guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://baarspo.ru/123?utm_term=mcoc+mastery+guide+2017+pdf PDF link annotation
    • http://dabiboniner.22web.org/97558797757.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/mufovenoned_rixodajiwatelem_vowujusimogik_lawoba.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/cPjigiO/fixewaxaxesumemum.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/HOzhajd/sims_mobile_cheats_ipad_unlimited_money.pdfIn PDF document text
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/subulagibixijazero.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/3642904.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/ihShcTQ/87642942492.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/blouse_neck_designs_2018_latest_imagess22ck.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/WhaXjic/emoji_five_nights_survival_online.pdfIn PDF document text
    • http://saleproducts.pro/sistema_de_encendido_computarizado_nissan02iqu.pdfIn PDF document text
    • http://letogala.iblogger.org/marathi_to_english_translation_online_free.pdfIn PDF document text
    • http://nickned.me/253396879976spys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivemawafazixi.epizy.com/forensic_audit_report_format_icai.pdfIn PDF document text
    • http://zavujosabojid.rf.gd/wifuxuligovu.pdfIn PDF document text
    • http://zaleponijodo.epizy.com/toefl_itp_listening_practice_test_with_answers.pdfIn PDF document text
    • http://nuvijexuwafado.rf.gd/calendars_by_readdle_for_android.pdfIn PDF document text
    • http://dekuxibasor.rf.gd/kalev.pdfIn PDF document text
    • http://gaxomin.rf.gd/charge_sheet_format_in_marathi.pdfIn PDF document text
    • http://kagowuv.epizy.com/60367577448.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/10198096258.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_off0001b376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B376 5956 bytes
SHA-256: 12174c9c8a1049b967bf93a0dd2f818b8365d16ca73d9a19b1d2f37202d7a9e2
font_01_sfnt_off0001c7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7C1 11028 bytes
SHA-256: 356582ae53c0f35bc670e9d3f5994defe50fe9f9aa0ad529bea569be23ab413b

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