Malicious PDF — malware analysis report

Static analysis result for SHA-256 5821e5119f0afa6f…

MALICIOUS

PDF

81.2 KB Created: 2021-05-05 16:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06dbd10dd7961b38579861c7645e138 SHA-1: d4ebd6b5d475bcbf6af9c4b677323065f578dc24 SHA-256: 5821e5119f0afa6fe0e9b4123a2edd2987e5ab93f5458041083ce54d125a30c1
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, includes metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous embedded URLs further supports the phishing and malware distribution intent.

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://jumiwimov.ru/strik?utm_term=the+things+they+carried+movie+vs+book
    • https://cdn.sqhk.co/bivosozos/1jgjfLd/81890513978.pdf
    • http://domen3.club/61563823996tsad8.pdf
    • http://hookup754.fun/what_is_the_best_example_of_a_vestigial_structurectwps.pdf
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5ff7e06f562af.pdf
    • https://cdn.sqhk.co/felebamifuk/jehbkFv/66228409113.pdf
    • http://iblack.space/fancy_text_cool_font_generator_apke7yi4.pdf
    • http://flathead.us/zanigugimijazavex3pv1.pdf
    • http://meetporte.xyz/kadofumamemanuduaxl39.pdf
    • http://tuworiki.22web.org/18522251460.pdf
    • https://cdn.sqhk.co/zosiwutu/g3AfP42/charles_v_holy_roman_emperor_facts.pdf
    • http://copyrights-notices-helps.com/aa_step_four_workbook0ek71.pdf
    • http://alfa-quest.ru/formules_magiques_alphasq1bdx.pdf
    • https://cdn-cms.f-static.net/uploads/4527357/normal_603ded480f2af.pdf
    • https://cdn.sqhk.co/fejisedetu/ldiK6jc/nudebekiwijavanabavosupu.pdf
    • https://cdn.sqhk.co/buzaxelubot/Yhcjbuj/ringtone_download_for_iphone_11.pdf
    • https://cdn.sqhk.co/lobinazema/gLggii3/parental_consent_letter_south_africa.pdf
    • https://cdn.sqhk.co/kedetofido/giiihcv/adventures_of_mana_ps_vita_metacritic.pdf
    • https://cdn-cms.f-static.net/uploads/4481821/normal_601340564c864.pdf
    • http://pro-komp-master.website/552813932975oee7.pdf
    • https://cdn.sqhk.co/wotinobeb/fKjcwgg/red_ball_volume_3_math_playground.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lanogiwelo.rf.gd/pukik.pdf
    • http://dodagedopijon.epizy.com/libro_sencillo_en_ingles.pdf
    • http://tijopuzotozume.rf.gd/siesta_key_10_day_weather_report.pdf
    • http://wifudozakiteg.epizy.com/sapekepi.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_off0000ff4e.bin
085032f858dd1b6dcba542b4d48f4e6f21aebddbe1a5717fb4fddb2295f86302
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 5636 bytes
font_01_sfnt_off0001125e.bin
60125842a55affbd0438adcf9f1ca974d513f9f9c57febf942d6a904cb596dc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 10768 bytes