Malicious PDF — malware analysis report

Static analysis result for SHA-256 03da01dd99949bee…

MALICIOUS

PDF

76.9 KB Created: 2021-02-19 11:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 080a1545c37db00d916fcaa124797c43 SHA-1: 4bc9e42ab64bc5ebd5b00f655f9743d4cff0e27b SHA-256: 03da01dd99949bee9fc415bb7096e8bcb328e3700c42fb229b7e43591bebf890
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The embedded URL, disguised as a search query, points to a suspicious domain, likely intended to host a phishing or malware delivery page. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

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://baarspo.ru/strik?utm_term=is+the+ged+social+studies+test+hard PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368218/normal_6021741508b86.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/nhbgfgi/stacked_leggings_set_plus_size.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/9483324.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/vivulilexugoja.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/mic3iaN/taboo_minute_timer_and_buzzer_sound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_601fd7ccb1f1a.pdfIn PDF document text
    • http://lozajakar.iblogger.org/subject_and_predicate_worksheets_for_grade_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_600839d8a3692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469852/normal_5fca142edff94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5ff55c54f16ff.pdfIn PDF document text
    • http://vegavos.22web.org/srikakulam_burrakatha_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_5fe10907eb9fe.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/2c34686730e3c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_600c1cab2b345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5ff32a1af1815.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibasas.epizy.com/free_music_cd_covers.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/31998156935.pdfIn PDF document text
    • http://sinamalamukin.epizy.com/kivemi.pdfIn PDF document text
    • http://zofigofaka.epizy.com/lollipop_bhojpuri_song_mr_jatt.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_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 5140 bytes
SHA-256: 2d43cfa7db992ff95af993104dce09161962be510f6ede3cc99baebe99339a36
font_01_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 10632 bytes
SHA-256: 29146b2b187b7b101114920cf56802534483c22eca5e9997e7c96f0c4a730166

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