Malicious PDF — malware analysis report

Static analysis result for SHA-256 342ee4466e56b80c…

MALICIOUS

PDF

105.7 KB Created: 2021-03-23 07:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb4c52df24b8c0449d85f86b991c852c SHA-1: 7b30d3713cc5cc94066a3df1d9a60c2a2feacfbb SHA-256: 342ee4466e56b80c4f0cdbc9cc3225d51f512e5789957d096fa58617395d108f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware delivery lure. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install or connect with a remote support tool, a common pretext for malware deployment. The presence of numerous external URIs, many pointing to disposable hosting, further supports a malicious intent to redirect users to potentially harmful content or download further stages.

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pelibifir.ru/wix?keyword=divorce+in+india+culture
    • http://jewofuvivonog.getenjoyment.net/kixewofapufep.pdf
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/zegukebokozi-rexobeso-mesajexovum.pdf
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/4440506.pdf
    • http://nakidki-alkantara.xyz/filosofia_da_educao_livro6j4ey.pdf
    • http://zajilakofudo.scienceontheweb.net/fujenonajifemebobop.pdf
    • http://lozuzaragujeb.mypressonline.com/l_athisme_expliqu_aux_croyants.pdf
    • http://metiwizonud.getenjoyment.net/phosphorus_cycle_in_aquatic_ecosystem.pdf
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/306068.pdf
    • http://jipetabonitu.mywebcommunity.org/buvavepuzutofilebakaxi.pdf
    • http://sakulog.sportsontheweb.net/vifexalusomegezobugume.pdf
    • http://gilumesu.mypressonline.com/hernia_hiatal_dieta.pdf
    • http://tijudozi.scienceontheweb.net/icom_756_pro_specifications.pdf
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/2670759.pdf
    • http://xobilosusi.sportsontheweb.net/displasia_broncopulmonar_bancalari.pdf
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/7656546.pdf
    • http://maska-respirator.shop/judatumorunodaat9uj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kakedujeruvos.epizy.com/charles_dickens_a_christmas_carol_first_edition_replica.pdf
    • http://wuwedilejom.myartsonline.com/karcher_pressure_washer_pump_rebuild_kit.pdf
    • http://fonujepurixadal.epizy.com/lokamufujinirikakako.pdf
    • http://kasupitebuse.rf.gd/star_maa_telugu_tv_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001525d.bin
520443cdd3ac1f153d6e1e8ce375aeb81b9149650b7a02abc1a323ee84f26267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1525D 4696 bytes
font_01_sfnt_off0001625f.bin
8c3c1889d20fe22ee7200f0f245672035ab8a4a51aca84b0e30d93797cc88ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1625F 12496 bytes
font_02_sfnt_off00018b69.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B69 4324 bytes

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