Malicious PDF — malware analysis report

Static analysis result for SHA-256 2391f50cc55250d1…

MALICIOUS

PDF

77.5 KB Created: 2021-02-25 21:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1aba79c128bf3ebc361d78ee14f2aa15 SHA-1: 81688a733133bb22a0d203ef7b6b643ab3c6bd1b SHA-256: 2391f50cc55250d1ff4d9449d301a3905db23f6fea925ce0271098a24f96f70f
184 Risk Score

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
  • 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://crophysi.ru/award?keyword=honda+gx160+pressure+washer+with+cat+pump In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_602d8da59fe3d.pdfIn PDF document text
    • http://dajexori.mypressonline.com/67754886963.pdfIn PDF document text
    • http://douchely.xyz/oxygen_not_included_map_seed6wbs7.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/5564971060.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/gdhhhjV/58871451622.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/slow_cooker_chili_5_ingredients.pdfIn PDF document text
    • http://homearfes.com/578203080783dxp1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_5fd1bb9814d27.pdfIn PDF document text
    • http://fitokaps.xyz/92206423021a9vjy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5fde1141099cf.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/gd3hcgd/20702083338.pdfIn PDF document text
    • http://sallles.ru/wayne_dalton_garage_doors_costyt6x0.pdfIn PDF document text
    • http://soinjaga.ru/55804726144x1bl0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393638/normal_5fec51f54bd5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fedad465c0c1.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/xavununobedamawuse.pdfIn PDF document text
    • http://7lessons.fun/lipojobonejazubifeberirlrzd.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/what_was_the_main_purpose_of_the_ancient_egyptian_pyramids.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 5924 bytes
SHA-256: 9bb29fbe682c099656a62925102be4597cebdbcd3f80f677319408e583fb2a54
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 10336 bytes
SHA-256: 6768fcf13b28fb8b264c27cbb47be73201a6e858aa111597abcdd02e24396e5a