Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a1cf6ea990c255…

MALICIOUS

PDF

81.1 KB Created: 2021-03-25 08:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b24bd0766b9586697da8a8d9cfeedd4 SHA-1: 2b642f2f90447331daf0c82fc51167dfb7f9aea9 SHA-256: b1a1cf6ea990c25581dc314ca1742b9fac2c220e05e20aa35f11c90c79221945
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query for resetting a Hisense TV, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=how+do+i+reset+my+hisense+tv+to+factory+settings
    • http://devgm.design/free_tv_movies_site835ks.pdf
    • http://lovechat24.club/workshop_attendance_register_templateiw014.pdf
    • http://www19216801.site/risalaxugepifimefomuuq0x5.pdf
    • http://wevepizivato.22web.org/kerala_budget_2019_free.pdf
    • http://investmag.org/daximekomawewuriwn0eh.pdf
    • http://tedewirivotu.iblogger.org/lezaroxavazuzobexi.pdf
    • http://hesap-al-sat.com/rokawowumeluwukobagadugp6d28.pdf
    • http://ihsteam.ru/game_pc_windows_10_32_bitcnti2.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/zawebu.pdf
    • http://it50disconto.pro/yasar_nuri_ztrk_namaz_kac_rekat_ve_kac_vakitrqo3k.pdf
    • http://a-trvl.ru/mabekofuwobokp7wf6.pdf
    • http://bazis-rostov.com/8711803284uxgnw.pdf
    • http://farvestnn.ru/gumokoxafepejetunutoz53xb.pdf
    • https://popofexepazor.weebly.com/uploads/1/3/2/6/132680818/nifeziwana-jelidu-vubovawus.pdf
    • http://nasty666.space/97390196279egsdu.pdf
    • http://storezone.info/widaxititezemazoytp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fopekexu.epizy.com/football_world_cup_2018_teams_list.pdf
    • https://uploads.strikinglycdn.com/files/d10e0741-da6a-4cf8-9946-33983ca6556f/sosepagisatowusuxagomosax.pdf
    • https://uploads.strikinglycdn.com/files/c61b2ee4-2190-4af1-9de4-9452a1a53d08/tolotufem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f230.bin
2baa3a18527cb44479117cf6b5527ba9eb26d6880560a1918c6e5a049dcfed2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF230 5408 bytes
font_01_sfnt_off00010488.bin
dcf513319c88cfc7e3873d854c2c7e9e3076884d3c58067e07ef1779ee1127a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 10840 bytes
font_02_sfnt_off000128e8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 4324 bytes