Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94bb071899771be…

MALICIOUS

PDF

73.6 KB Created: 2021-04-16 15:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f0a11fc889110ee02b6e1d715dcd9e4 SHA-1: afca1d6dfef59f1140b25eaa3f57fff7cb327531 SHA-256: f94bb071899771becd784e06bec51fac9bcbe663a0035dfed1f6f6a33a9b1391
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain associated with malicious activity, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to a 'crossword puzzle maker'. The presence of embedded URLs and the overall malicious classification point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=crossword+puzzle+maker+free+printable+no+download
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcb07b940a2c.pdf
    • https://cdn-cms.f-static.net/uploads/4412762/normal_604e7a04ab529.pdf
    • https://cdn-cms.f-static.net/uploads/4368228/normal_605c41e37deaa.pdf
    • http://pefiworawodud.mypressonline.com/razer_ouroboros_driver_windows_10.pdf
    • http://tarageleg.iblogger.org/68810517243.pdf
    • https://cdn-cms.f-static.net/uploads/4417318/normal_604a0baf07b83.pdf
    • https://cdn-cms.f-static.net/uploads/4471691/normal_6056d4f66df2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mosezavor/reinforcement_vs_punishment_scenario_worksheet.pdf
    • https://s3.amazonaws.com/zizene/movie_themes_flute_sheet_music.pdf
    • https://s3.amazonaws.com/jeworurowam/logarithm_and_exponential_equations_worksheet.pdf
    • http://zulanow.rf.gd/pendidikan_islam_di_indonesia.pdf
    • http://rovuwuruw.epizy.com/solving_quadratic_equations_with_square_roots.pdf
    • https://s3.amazonaws.com/bamepofewalada/28699494316.pdf
    • http://rovuwuruw.epizy.com/buvigab.pdf
    • https://s3.amazonaws.com/kuxegu/jomutonagakomosezese.pdf
    • http://nujugeteteda.myartsonline.com/73053131565.pdf
    • https://s3.amazonaws.com/rixevozajixezos/43061087684.pdf
    • https://s3.amazonaws.com/tutasujal/transformao_de_bytes_para_megabytes.pdf
    • https://s3.amazonaws.com/rizijubovapuk/stock_market_bubble_burst_meaning.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/gagabimikisu.pdf
    • https://s3.amazonaws.com/viboxikuz/hydrocarbons_experiment_lab_report.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/miss_universe_2013_final_question_and_answer.pdf
    • https://s3.amazonaws.com/viromibukoleliw/website_templates_free_html_with_php.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e357.bin
bf6b0c40c754064d16f3404d8ecf4ae8f4961662ef5572e39e601be0b8fddf92
pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 5436 bytes
font_01_sfnt_off0000f5d1.bin
a84eba76d5a6f7fafe7c688e50105546d1070db647a0d35e2acde850daad1da3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10152 bytes