Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaea6c72e440a486…

MALICIOUS

PDF

83.6 KB Created: 2021-02-07 04:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f575f6a1eab0ef17f5b641967ff56857 SHA-1: 5e071ff07b1277134522318169951729c58cb6b7 SHA-256: aaea6c72e440a486ab10129d4853c6b19aaecb2d508a5119eaa0c0261cb9d784
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wb?keyword=liu%20yang%20river%20piano%20sheet%20music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5ff2030ee4cd5.pdfIn PDF document text
    • http://buyfastedcircle.xyz/logitech_g_hub_not_detecting_mouseu6c9o.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/78cf5d9a7d.pdfIn PDF document text
    • http://idealsit.fun/865940025898aszb.pdfIn PDF document text
    • http://kupivse.xyz/62138976148z656g.pdfIn PDF document text
    • http://fruittea.space/dizixexomndwi.pdfIn PDF document text
    • http://dexemipewuga.22web.org/el_camino_del_artista_completo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5fc70216c9921.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/archer_hotel_burlington_menuyaubg.pdfIn PDF document text
    • http://bigno.space/77798598637idwgn.pdfIn PDF document text
    • http://aarbuz.space/lozetiwekexenufenarh782r.pdfIn PDF document text
    • http://priz24.site/mejunenulyur1r.pdfIn PDF document text
    • http://ontrade.top/mansfield_ma_police_reportsjwmup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tawenaxogiminax.epizy.com/cal_fire_riverside_incident_report.pdfIn PDF document text
    • http://zuzofigub.rf.gd/platform_movie_mp4_hd.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/bukaresiwa.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/87026622392.pdfIn PDF document text
    • http://xoxigibutu.epizy.com/periodic_table_charges.pdfIn PDF document text
    • http://sivakekixil.epizy.com/decimal_to_fraction_conversion_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 5300 bytes
SHA-256: 00f78557d9a6e2b04f32ca810a326cea8c149499b779e5bb388d85d1c92ea4e7
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 12860 bytes
SHA-256: 8232e8fed0fc285af663c10c68e98fe9aabfe772bb885d7d64d99a3e9e16178c
font_02_sfnt_off000116e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E7 17424 bytes
SHA-256: d54fff16dc011e79db9c0dee7e39a57e53d8aea6e8344417ea45fa16928a8216
font_03_sfnt_off000130d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D0 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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