Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef23dc0fd852a6a…

MALICIOUS

PDF

64.3 KB Created: 2021-02-17 16:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: acbe81a73e30972c3aa0ac6b7af0cb1f SHA-1: ac18cb42ed7ecf5abc17476c6b55b6e8d776d959 SHA-256: aef23dc0fd852a6a3190a87226f0d2c2ac404c3f3bb3a2b887ea27f7c2576327
126 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
  • 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://druttle.ru/wix?keyword=word+by+word+picture+dictionary+pdf+vk PDF link annotation
    • https://cdn.sqhk.co/zivuzigup/TngjfmX/26874552421.pdfIn PDF document text
    • https://dimazupaw.weebly.com/uploads/1/3/2/8/132814154/363717067fa5.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/lizevilone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_6009089e85d81.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/7LibhbZ/18211850487.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/jinapafenogevifobitoxl9twm.pdfIn PDF document text
    • http://stopnutristrike.ru/twitter_search_people_s_tweetsugcg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_602a1553e9314.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/vicks_filter-free_cool_mist_humidifier_v4600_white_instructionsxe1fw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415300/normal_5fffda90088cf.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuvusu/jGDghii/tank_stars_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/JZhdghC/26348624265.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/genoxozeletoze-kitek-patesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388421/normal_5fca33177a67f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_602471e98aded.pdfIn PDF document text
    • http://everydays.space/260794850699gj9w.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/tupofelasujewas/java_version_8_update_201_msi.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_off0000c05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05A 5408 bytes
SHA-256: 2a24b97bf0b085bcab6171d1d047605cd2fd75bf8ed49515fcb8afac6b5e2bd5
font_01_sfnt_off0000d2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F7 9784 bytes
SHA-256: 303667a8e3e41454d1e7804b05aea82e2aeca9d15f0d9af33c2ff26c32e5db18