Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c44c570ed7c2d4…

MALICIOUS

PDF

73.7 KB Created: 2021-02-07 19:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 89f15d6a1e43ae4908aec294918ecedd SHA-1: 0314e4452200881a24c5bb661edb76143acd73e4 SHA-256: a3c44c570ed7c2d471cb8bbd6c9eb7e0533432dbbacad09d8e33828771a6ae93
166 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=books+app+store PDF link annotation
    • https://cdn.sqhk.co/logubaxe/asiiCkK/square_painting_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/jhnXjc6/37165902131.pdfIn PDF document text
    • http://natorg.fun/100_benefits_of_meditation75ln1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_601587b616efd.pdfIn PDF document text
    • http://inmyshtangen.xyz/stardew_valley_minerals_sell_or_keepp4hdq.pdfIn PDF document text
    • http://ch-redirect.icu/tovixatetel3nx.pdfIn PDF document text
    • http://leadtop.co/hacksaw_ridge_movie_dual_audio_300mbd9ghy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_5fea04ab94b32.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/A1CFggC/53263875460.pdfIn PDF document text
    • http://girlita.space/fuzilci11e.pdfIn PDF document text
    • http://nesobaka3.xyz/25431721867eb3l8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_60110f0f59304.pdfIn PDF document text
    • http://cadenalia.com/first_aid_usmle_step_15yzp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vunowilivazadul.rf.gd/67190576059.pdfIn PDF document text
    • http://fewuzefar.rf.gd/democracy_and_diversity_class_10_notes_mycbseguide.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_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 4892 bytes
SHA-256: 6bd2d11b9896ddd5e5786dc042af6f100261f21831a649197468b0470d3e3844
font_01_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 10780 bytes
SHA-256: aa2d11c197be546e10a66d5048b6b292e0b3f4812888a3f58317f93371ecac04