Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bbdd2749f06bfd…

MALICIOUS

PDF

75.4 KB Created: 2021-04-04 14:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ffc136b51f697b6c10e5bb213e24be SHA-1: e0550eb8b2292454024068589a8e131e38de2759 SHA-256: 10bbdd2749f06bfde57aa2a7275a851533da19e1e99cc954791a98f1d5ec3e53
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The embedded URL likely leads to a phishing or malware distribution site, attempting to trick the user into downloading a payload or submitting credentials.

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://nipisod.ru/award?keyword=bono+s+menu+pdf
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60170e9f281c6.pdf
    • https://cdn.sqhk.co/pizililiv/dCihghL/the_zombies_time_of_the_season_lyrics.pdf
    • https://cdn.sqhk.co/pesasotiro/kpznDPL/temurapuger.pdf
    • http://dazenad.iblogger.org/29916365476.pdf
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5fc8b441de1d6.pdf
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fd8cf434c323.pdf
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60152acd49e3d.pdf
    • https://cdn-cms.f-static.net/uploads/4472783/normal_603a88c326d04.pdf
    • https://cdn.sqhk.co/tipefimex/Lihg7Zn/bewegalufixojox.pdf
    • https://cdn-cms.f-static.net/uploads/4380531/normal_60270484af477.pdf
    • https://cdn.sqhk.co/xebibugekux/6wjejjN/zuxadawewikuzili.pdf
    • https://cdn.sqhk.co/vajirasavuz/VLjbcgd/vixatoda.pdf
    • https://cdn.sqhk.co/pevedapev/Cgdhfii/stack_overflow_java_error.pdf
    • https://cdn.sqhk.co/mewuxedodi/gjeVjjp/5628376558.pdf
    • https://cdn.sqhk.co/sarimotel/cWjaQWe/12177536073.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vizawog.epizy.com/vcenter_server_6._0_free.pdf
    • https://s3.amazonaws.com/zuniverijesud/vapukofagativad.pdf
    • https://s3.amazonaws.com/timituvupame/application_letter_sample_for_teachers.pdf
    • https://s3.amazonaws.com/zepifudoxapo/john_deere_60_inch_mower_deck_gearbox.pdf
    • http://gumigojozupe.epizy.com/vorejumopewolepojuwa.pdf
    • http://zopaxavebalopa.epizy.com/batch_file_manual.pdf
    • http://futoriw.epizy.com/how_to_calculate_the_number_of_days_without_weekends_in_excel.pdf
    • https://s3.amazonaws.com/najubu/61289856324.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_off0000dfeb.bin
c0e8031cecf94749289ff2ae8220db02b8c97555650bd3c5452aac246deaa6d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 4896 bytes
font_01_sfnt_off0000f08d.bin
888635abefc7fdbd99b66ba4d6e30dc35c9c24037b0c87c121e5a9de472b2faa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 15532 bytes