Malicious PDF — malware analysis report

Static analysis result for SHA-256 155d3017c4b608ac…

MALICIOUS

PDF

81.3 KB Created: 2021-02-14 17:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bc64caaf023ad1f44ee991ddb3d7f296 SHA-1: f5ddf1d7f9f326902c7eac1c0f6403b2c8c8bc20 SHA-256: 155d3017c4b608ac78ed2815c112d0a920b782ee2e29fc6f027e5d2e62cb065a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a URL pointing to a 'fake gps go pro apk free download' further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=fake+gps+go+pro+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/wexufenu/eha6Lg7/26222211715.pdfIn PDF document text
    • http://tehnotop.site/kark_seme_trkler_40_adet_mzikc2yzh.pdfIn PDF document text
    • http://seamanygau.best/databalugotild09nk.pdfIn PDF document text
    • http://pojorabe.iblogger.org/mawatoneb.pdfIn PDF document text
    • http://sun-italy.space/accelerated_stability_studylmixi.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/ighieSf/dragon_ball_symphonic_adventure_2019_usa.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/zomididofavime.pdfIn PDF document text
    • https://nomabedipami.weebly.com/uploads/1/3/1/4/131437379/sesoluvix_wagafawode.pdfIn PDF document text
    • http://plsale.pro/hernia_inguinalis_medialisqzn49.pdfIn PDF document text
    • http://tojiritukimafom.iblogger.org/desert_rose_sting_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://napilidowolaro.rf.gd/induction_program_for_new_employees_report.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/2796318482.pdfIn PDF document text
    • http://lawupoxag.epizy.com/asterisk_cli_commands.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/world_s_greatest_swing_set_plans.pdfIn PDF document text
    • http://gozebodene.rf.gd/police_incident_report_template.pdfIn PDF document text
    • http://repeputowuz.epizy.com/clock_worksheets_o_clock.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5320 bytes
SHA-256: 86d72b76324e8539094d221e075229d2a13a879fefa79d81aa4b22dadbcdc1c6
font_02_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 10992 bytes
SHA-256: 84dc12dc61fdbd7603f0b1100fc30537723358596baa823fbf533047ca417494
font_03_sfnt_off00012296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 16060 bytes
SHA-256: 7f768ca11fcfc9b6522a79bc5aead0f72c364649a2351afcbc76e5eea0a2d6db

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