Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b4db9da29026b2…

MALICIOUS

PDF

84.3 KB Created: 2021-02-24 20:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d10e58800b1b79e501e8911f89cbc7f1 SHA-1: 16f376208a31a59171ce183dd427e84362c670ac SHA-256: 39b4db9da29026b2e40a86aba42710ff7ea834264b209cc373a769cf618cf082
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/award?keyword=the+boys+comic+book+collection PDF link annotation
    • https://sekotujuf.weebly.com/uploads/1/3/5/9/135960234/12b3fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_60333a115fa1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fd6361d599af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5ff4bbaf1d378.pdfIn PDF document text
    • http://hugertely.xyz/century_arms_c308_battle_riflecqjdx.pdfIn PDF document text
    • http://hookup754.fun/kinemaster_apk_without_watermark_for_pcwh3ox.pdfIn PDF document text
    • http://lg-copyright.com/16025270679f5bwc.pdfIn PDF document text
    • http://govnosiakxws.online/can_cortisone_shot_affect_sleepx77na.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/6a4ea20.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/what_are_the_environmental_indicators.pdfIn PDF document text
    • http://copyrighthelpcentral.com/77459918349c7jq.pdfIn PDF document text
    • http://opssmall.space/bazamesukdsckh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff2e025770a0.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/b248cff3a40ca.pdfIn PDF document text
    • http://busibear.com/47449494963i7svy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefitanebigovun.rf.gd/acpi_smo8800_1.pdfIn PDF document text
    • http://junulobexatini.rf.gd/63096335337.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/how_to_fight_hand_to_hand_in_cyberpunk_2077.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_off00010f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9A 4988 bytes
SHA-256: f8d4473f3daa6ec8d05521a72528a7ff72b565f440ff17d830a7ecfdc8d818e6
font_01_sfnt_off00012079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12079 10500 bytes
SHA-256: 07bd4255ae5177308b88354b3502e07f0872bda3c7bac6bacba69913768bc398