Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e00542ec7b7c4b0…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 13:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b98f24ddaf651bc7491860be7f16df6 SHA-1: 36622a79cea59bedd6646c1bcf552fec6ca5682a SHA-256: 8e00542ec7b7c4b090f999b5e59c5e8500c06ba90557006eb2c02af39bd4b00e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Birthday photo book online', suggesting a lure. The presence of numerous external URIs, including one pointing to 'jacksth.ru', strongly suggests the document is designed to redirect users to malicious content or download further payloads. The PDF structure and embedded links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=birthday+photo+book+online PDF link annotation
    • https://dobojadu.weebly.com/uploads/1/3/2/7/132711966/tidawax_jexulapawepe_xukotokisow.pdfIn PDF document text
    • https://gemujofu.weebly.com/uploads/1/3/4/3/134372819/zigovumapiripu_borawijevikon_wimari_solatasakuvo.pdfIn PDF document text
    • https://xunasumip.weebly.com/uploads/1/3/2/6/132696393/9285430.pdfIn PDF document text
    • http://koteyarn.moscow/adafruit_io_android_appdnsgm.pdfIn PDF document text
    • http://ellmax-site.xyz/bianca_nieves_y_los_7_toritos_chapter_5cvid8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_60303925d5808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ffd390f0f6c9.pdfIn PDF document text
    • http://natikolom.site/emulador_nintendo_64_apkp4wf3.pdfIn PDF document text
    • https://nugurevupag.weebly.com/uploads/1/3/4/1/134108952/bumadezeridaje.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/lp_hernia_umbilikalisjd2o6.pdfIn PDF document text
    • http://mogoxopedutisaw.iblogger.org/ashabul_furud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavulavusutiki.rf.gd/mol_ahirani_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/40089145225.pdfIn PDF document text
    • http://mufifofoge.epizy.com/best_hip_hop_dance_mp4.pdfIn PDF document text
    • http://lidojera.epizy.com/81242782295.pdfIn PDF document text
    • http://wukezize.rf.gd/auto_title_transfer_texas_form.pdfIn PDF document text
    • http://xirotowukutizu.epizy.com/wen_56203i_super_quiet_2000-watt_portable_inverter_generator.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/business_letter_writing_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/jesosexubasoza.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/mevumijipajovulerobe.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/spotify_yo_amo_los_diagnosticos.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5224 bytes
SHA-256: ac87bb2acdbfb54d404f4e2caa5b2c30736424856d688ee2016a57a016585c3b
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 10900 bytes
SHA-256: b7c74fdb0b2b433f21c1a2d031883c16f257b999a66f56e16afad2cd79624dc8

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