Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a39a0e94d7ea981…

MALICIOUS

PDF

69.3 KB Created: 2021-02-16 00:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0719808b275ff2d8f9838b35ff8b910e SHA-1: ad1ebbce5da3dfd0b804c64c9c727276a0cfba22 SHA-256: 2a39a0e94d7ea98134c0671d1dff993365b73f30f597504a4a89bd9144bbac3d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=lana+del+rey+video+games+ukulele+chords+easy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fd11af3a5ae9.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/fd2308.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/3vhed5h/year_end_gifts_for_employees.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402712/normal_5fe19ba5ad99e.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/ggiexQZ/66232783216.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/5226922.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/ijjcux1/20425639512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5ff801cc5d7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/g8igjhg/game_of_thrones_season_1_king_s_council.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/HhfXThj/ufc_fight_last_night_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/jaXphjA/fireboy_and_watergirl_elements_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5fdcfbdf343e9.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/1933084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapureju.epizy.com/javowivebojabuz.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/medical_case_study_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/asbestos_cement_sheet_removal_risk_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/77769836543.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/error_on_credit_report_clearscore.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_off0000cf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF46 5520 bytes
SHA-256: de35275e171551822d7360e2a174e7e4f54028eb06e55ad3e28fb67f42d638c2
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10580 bytes
SHA-256: 33b103a27de1a160602fac8bc1e614735ef51f5b3aca84195c6e5b1233e80019

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