Malicious PDF — malware analysis report

Static analysis result for SHA-256 db12249822c03510…

MALICIOUS

PDF

78.1 KB Created: 2021-04-01 13:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63dabdd2a41e35df05a56fb44234ac97 SHA-1: 7671bfa44aced7450f48218ede9c525061f792e3 SHA-256: db12249822c0351042ebf437c7d7cec6bb59865af0cd10e11041a2901a89e19c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=teaching+advertising+techniques+worksheets
    • http://bufovapafiwew.22web.org/farovatagewe.pdf
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd260ec01643.pdf
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/09a9243c3.pdf
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/kubumokojavoje.pdf
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/gubomelurajunu-wunibazowu.pdf
    • http://zuluwana.iblogger.org/chinese_movie_2019.pdf
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/merixumowoderif.pdf
    • https://static.s123-cdn-static.com/uploads/4464527/normal_60034a6a3ebca.pdf
    • https://cdn-cms.f-static.net/uploads/4389104/normal_604ac80bec4f6.pdf
    • https://cdn-cms.f-static.net/uploads/4392864/normal_6058bd3101c73.pdf
    • https://cdn-cms.f-static.net/uploads/4468814/normal_601fb76a2813c.pdf
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5fe59a0d1cdac.pdf
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/e7a54.pdf
    • https://cdn-cms.f-static.net/uploads/4489244/normal_600ae7a7d1d4c.pdf
    • http://dugipoxumiku.iblogger.org/85404107297.pdf
    • https://cdn-cms.f-static.net/uploads/4495551/normal_601585c1772ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizuluworafid/the_boy_in_the_striped_pyjamas_summary_movie.pdf
    • https://s3.amazonaws.com/wefemabeni/kaala_patthar_movie_song.pdf
    • http://retelowanudugut.epizy.com/silent_worship_sheet_music_free.pdf
    • http://rutotonofawe.rf.gd/texas_instruments_ti-30x_iis_calculator_online.pdf
    • https://s3.amazonaws.com/dowavelaxam/advanced_learner_english_dictionary.pdf
    • http://jeduxotikeg.rf.gd/best_race_for_beginners_warcraft_3.pdf
    • http://www.readwritethink.org/classroom-resources/lesson-plans/persuasive-techniques-advertising
    • 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_off0000f3ec.bin
1c79a6d55f750a29c833b75460872a86fa0a32b625f8efae7778f9a45027a522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 5460 bytes
font_01_sfnt_off00010680.bin
bdba6b5670ec5121332042e1d11ac364a8d8c5f0b8d01a36543c5f1a4b1d3ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 10776 bytes

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