Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bedc2b9a9e2ade6…

MALICIOUS

PDF

84.6 KB Created: 2021-02-13 20:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bfb75608580bfbce3e49e695290feaff SHA-1: 5286599aa8ead87cfbb9390fe6617872830856bc SHA-256: 9bedc2b9a9e2ade622845745325c788ccc304bf1cb9f13846f90d378269a36bf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and one specifically linked to a search query for game cheats. Heuristics indicate it's a link farm designed to redirect users, and ML classifiers and ClamAV strongly flag it as malicious phishing content. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for malicious PDFs to execute further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=cheat%20keyboard%20for%20gta%20vice%20city PDF link annotation
    • http://biggymstoe.com/ponimosapuxusatuzaponet0c.pdfIn PDF document text
    • http://gemobaraza.iblogger.org/91510710158.pdfIn PDF document text
    • https://cdn.sqhk.co/nadudegimew/ygfgi5d/calla_lily_tattoo_sleeve.pdfIn PDF document text
    • http://repochka.site/hp_elite_8200_manualkcy89.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/0wijgeo/zepeto_no_pc.pdfIn PDF document text
    • http://werenntaq.online/bluffton_university_football_roster_2016kgszs.pdfIn PDF document text
    • http://basofeveku.iblogger.org/asnt_level_3_study_guide.pdfIn PDF document text
    • http://lidlid.xyz/free_multiplication_worksheets_3rd_grade_printables1tllo.pdfIn PDF document text
    • https://cdn.sqhk.co/nagotumubo/dhcxEji/99452999426.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/if9mmge/radadiberuwuxokevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijurajogo.epizy.com/shayari_good_night_photo.pdfIn PDF document text
    • http://kovefevejafuk.epizy.com/22899169476.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/pearson_realize_geometry_book_answers.pdfIn PDF document text
    • http://pakafadudu.epizy.com/digestion_absorption_and_transport_of_carbohydrates.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/coding_guidelines_for_hernia_repair.pdfIn PDF document text
    • http://zunizififuve.epizy.com/b._o._p_songs.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 5344 bytes
SHA-256: 81c60e6d8bf0ad448bb34334e10bdaa83f344b9516ba527bfbce9274e3073c96
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 22404 bytes
SHA-256: f70d0f84fd471db1d5f8f459a294db1c9728bf7a294bae6ef9f2e0ec954621b0
font_02_sfnt_off00012d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 16392 bytes
SHA-256: c9b9d40238817e9fd1c0b290bb100284b8f2d9dcc1188338581b9d27efa8fa30

Open this report in the interactive analyzer, or submit your own file for analysis.