Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0231c3cd286d7ff…

MALICIOUS

PDF

80.7 KB Created: 2021-03-20 21:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98c9bd1209b4bd5d3bcfec938851cff1 SHA-1: 5690e018028d3188bfd8b6f8c2f3603d894269d9 SHA-256: e0231c3cd286d7ff0d18bb6c06ae0db490a278228374f257e26dcb5473d61a66
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links to external websites, a characteristic of SEO link farms. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of numerous external links suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=2005+dodge+ram+1500+5.7+hemi+torque+converter PDF link annotation
    • http://kvyovk.xyz/wuliziramemenoxatoresa6uvpl.pdfIn PDF document text
    • http://watertea.space/finding_static_friction_coefficient_lab_reportvlh2l.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/j72heif/the_wolf_simulator_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/3idjjs2/aeria_games_files_wolfteam_csd_er.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/KhjxhcU/1350402837.pdfIn PDF document text
    • http://forecast.bet/bedadewh496v.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/94125486752.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/eXiaTZi/najifemigosiremevux.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/oNX2hgg/sacred_games_2_ringtone_mp3.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/shark_night_3d_movie_castseg60.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxixixixi/3ptD1je/gufebugi.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/gcTneKS/munej.pdfIn PDF document text
    • http://retamos.mygamesonline.org/chopin_barcarolle.pdfIn PDF document text
    • http://insurancecarusa.com/738305882374pjz5.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/ificge9/jebavenomapisifagufupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_ff0b0ab0575d4aed97d22dd8b5aa6121.pdf?index=trueIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_d3cc7f59c76a4d66bb91936a7d40bffb.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_5d07ad64866b4d949d7a4cda523db34d.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_f5a05ad9ff764df2a94aa71e17aa707f.pdf?index=trueIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_2dd5bf8846bb492799d0d5020e14e9da.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_2fcbd8bc324645348970a78b943a7b34.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_c8a9a9dfb3af455983479ee9dad6e491.pdf?index=trueIn 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_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 5796 bytes
SHA-256: a3442639ada91cd6a8884465e82aa5950979f0bc9e4a26db44cd45918941bf7b
font_01_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 11352 bytes
SHA-256: acfeede05128763d8ebd9efcad29c75bd2c125365a2245af5982e1f9e616673e