Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1d509655ba969b…

MALICIOUS

PDF

73.4 KB Created: 2021-03-27 15:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9a9b015984b0010486bdde0f34b21a77 SHA-1: bb2b8ff297af663c5f0217e9086fd8b041deaba0 SHA-256: 0e1d509655ba969b81e34afeabb85d43d25c475660d81c7c89b3a886678109f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('vilenefex.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to 'free online games', aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/123?utm_term=free+online+games+no++casino+slots PDF link annotation
    • http://mosquito.codes/capitale_du_monde_apkadc98.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/uitzending_bijwonen_formule_1_cafe.pdfIn PDF document text
    • http://muwazowezijowa.22web.org/arunachalam_tamil_movie_songs_masstamilan.pdfIn PDF document text
    • http://store50off.info/elaboracion_de_mapa_de_riesgos_peruhmo41.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/eso_mastery_nightblade_guidedaqlv.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/82260290959.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/47152938305.pdfIn PDF document text
    • http://metazexepajesen.22web.org/4550145123.pdfIn PDF document text
    • http://powerhdniy.space/how_to_pair_a_jawbone_bluetooth_speakerfjo4f.pdfIn PDF document text
    • http://kapimivibix.22web.org/biography_template_for_elementary_students.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lebejos/deretiguga.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/machine_learning_bootcamp_online.pdfIn PDF document text
    • http://vajekalisafemun.rf.gd/bulletproof_monk_hot_dog_riddle_answer.pdfIn PDF document text
    • http://kafozubasopuji.rf.gd/articles_partitifs_exercices.pdfIn PDF document text
    • http://nunoxemimo.rf.gd/shallow_piano_sheet_music_accompaniment.pdfIn PDF document text
    • http://rusesav.rf.gd/mitevakotevelo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/shinchan_cartoon_video_3gp.pdfIn PDF document text
    • http://rumigabel.epizy.com/english_to_afrikaans_translation_download.pdfIn PDF document text
    • http://losojotatilo.epizy.com/qasida_burda_sharif_in_urdu_download.pdfIn PDF document text
    • http://fusikisedote.epizy.com/kadukosewatofovowarab.pdfIn PDF document text
    • http://wudezila.epizy.com/how_do_i_fix_a_failed_printhead.pdfIn PDF document text
    • http://mipatupi.epizy.com/debawuletibabomumovez.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/replacement_parts_for_total_gym.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5072 bytes
SHA-256: a6f3e90be73469e288aaba0d2f7e8c8e0fc0388b391748af643ebbbd9e647007
font_01_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 10824 bytes
SHA-256: 6e58df62b0849954d35b2363e995613ef3790e2bfddb01bb4228e74c51ed1cb8

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