Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddca834fcbeb166b…

MALICIOUS

PDF

73.2 KB Created: 2021-01-20 14:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 44f0f2ca15bd45804eab83a14a7ced6a SHA-1: 3ddca11a97a7575ba776926077bdccb0179a6480 SHA-256: ddca834fcbeb166bc0f01238e576b491db1e055515a763b27f9355a064c86ccb
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://yafferge.ru/123?utm_term=how+to+craft+a+boat+in+minecraft%25EF%25BF%25BC In PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/zipomivano.pdfIn PDF document text
    • http://kabomodom.iblogger.org/98442153491.pdfIn PDF document text
    • https://site-1173386.mozfiles.com/files/1173386/gaming_wallpapers_apps_for_android.pdfIn PDF document text
    • https://nakigere.weebly.com/uploads/1/3/4/6/134608851/7915611.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/bow_and_arrow_roman_weapons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_5fdab7d00f78e.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/3163503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb3bd0308e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegenig.epizy.com/r4_3ds_emulator_for_pc.pdfIn PDF document text
    • http://kinikodiraxo.rf.gd/thyroid_clinical_practice_guidelines_malaysia.pdfIn PDF document text
    • http://tezebidurob.epizy.com/alesis_hr-_16_drum_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/lawidivivodinawewemitidoz.pdfIn PDF document text
    • http://povuputuk.epizy.com/yamla_pagla_deewana_all_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/bruxelles_formation_bf._tremplin.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/bahubali_songs_12.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_off0000e114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE114 5016 bytes
SHA-256: 81d1c901cb4fb09477ceefa18c9e30947e92ca55f97e543d09069c933d562dab
font_01_sfnt_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 10536 bytes
SHA-256: 70a5f926efb7e59a1f813ad9c388f891daf41a3a911114f5dac9937661269ccd