Malicious PDF — malware analysis report

Static analysis result for SHA-256 2282f3e3bebb8f40…

MALICIOUS

PDF

73.0 KB Created: 2021-02-10 04:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 046e558232525989181acb84170e4143 SHA-1: a9b1d72416029cddb702c3f848edc4f35d54a316 SHA-256: 2282f3e3bebb8f40d6bc2d875498b89bccc600bb7795fd6710f98bd8786d6fe2
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs and the document body suggest a lure for downloading software, likely a phishing or malware distribution attempt. The presence of external URIs and link farm characteristics further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=autotune%20for%20pc%20full%20version PDF link annotation
    • http://academic-club.ru/business_forecasting_wilson_keatingoy65l.pdfIn PDF document text
    • http://creditpm.com/miya_bhai_song_djjohalp9mrw.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/8jeihic/top_ringtones_for_iphone_2020.pdfIn PDF document text
    • http://dovulup.iblogger.org/detailed_itinerary_template_for_schengen_visa.pdfIn PDF document text
    • http://kataeta.club/oyster_auto_top_up_receiptpw3tg.pdfIn PDF document text
    • http://carbackseat.site/presentation_of_data_in_tabular_formhtgme.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/qDjj4gj/naxepamufusipop.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/f6hehfB/mineral_fusion_mascara_ingredients.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/gheifih/42693163452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwesupaletutu.epizy.com/42683341210.pdfIn PDF document text
    • http://bixerexexotepe.rf.gd/english_textbook_for_class_10_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/best_answer_for_interview_questions_about_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/avengement_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/zajemuruwoliwimuzog.pdfIn PDF document text
    • http://rawotagetanona.rf.gd/55885637968.pdfIn PDF document text
    • http://lokeliniju.epizy.com/live_planet_tv_apk_2019.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_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 4848 bytes
SHA-256: 7d9a638ef30e79950acc6ce41a54a77b1bdc30c7adaf5acc429815c2603d0357
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10920 bytes
SHA-256: 1b034ec50c7241f5ea7b3fe89c7f518cc203cb25fcbc85b0dffc922db0a578db

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