Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dbc3d95a738025…

MALICIOUS

PDF

67.8 KB Created: 2021-02-10 00:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ce42384a9bd1353f0a12e2cd75336a21 SHA-1: 2238fa62b27cd86e8fbfa2e73f8b89abae3b3938 SHA-256: 76dbc3d95a7380255f70af779565bc8eb903b1d4ae470afeea838f9f9ccae9df
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=generic+profile+picture+female In PDF document text
    • http://wbigs.space/aha_guidelines_blood_pressurex4e97.pdfIn PDF document text
    • http://idealica-co.site/vovivozak8uhvh.pdfIn PDF document text
    • http://getsol.xyz/773586859299wnsf.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/jiHigie/english_song_video_hd_2019.pdfIn PDF document text
    • http://all-casino.xyz/togudujefolazulavamexaxibwddm0.pdfIn PDF document text
    • http://shopsmmv.site/aha_hypertension_treatment_guidelines_2019t7n26.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/DXuhehh/blood_pressure_machine_omron_7120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fcdddd866086.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/g6wotxh/slot_machine_games_application.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_60126a05ed47f.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/hshjQhd/mediq_health_coach.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/72918961104.pdfIn PDF document text
    • http://renaxederopuva.rf.gd/46000694108.pdfIn PDF document text
    • http://pajamubo.rf.gd/biotransformation_system_enzymes.pdfIn PDF document text
    • http://lijazujarakowom.epizy.com/admin_template_angular_7_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF52 5012 bytes
SHA-256: f7e7feafa68883486fd32b4ed4fdcb32bff1c4bb5f238773562f587bb1d12dc5
font_01_sfnt_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 10176 bytes
SHA-256: 3a81bb8e193d401b82de928fa874cdf9459179c1d29c62dad7dd7118e9b60618