Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9513e9ef072d9a…

MALICIOUS

PDF

64.0 KB Created: 2021-02-25 16:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 96a498b0b3577d1646fe5f9b59b6b81d SHA-1: 7e448cd93d369a9743db9d63507989f8d7c8d4c1 SHA-256: 1e9513e9ef072d9a6d48a805cb9936272e70eec0e78b09363959a3c1fa471210
184 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to guitar lessons, which is then used to disguise the malicious intent of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8278

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 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
  • 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/strik?utm_term=curso+completo+de+guitarra+ac%25C3%25BAstica+pdf PDF link annotation
    • https://lajizifoposu.weebly.com/uploads/1/3/5/9/135958207/xovekininiboji.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesavif/dWihRKN/59100282517.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/iehijOH/resinous_luster_definition_in_geology.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/vigugo_fadojiwizekup_wifoxesuwub_wilesalaraz.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/jhj4EoF/photo_collage_maker_photo_editor_photo_collage_download.pdfIn PDF document text
    • https://fajupumivut.weebly.com/uploads/1/3/4/1/134108914/5549997.pdfIn PDF document text
    • https://meliwajovogowuw.weebly.com/uploads/1/3/4/4/134481672/zanijatadulixuvavuza.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/pobirafejorum.pdfIn PDF document text
    • https://lugoponogib.weebly.com/uploads/1/3/4/4/134404253/nobunalizawa_gifebesupisu_movekewibesugeg_banufexogudo.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/ggTjbie/19715254920.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/giejejh/zaxolot.pdfIn PDF document text
    • http://cardioactiveufficiale.site/pokijakeje5m64h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuwuzokapa.rf.gd/driver_vga_amd_radeon_vega_8.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 5496 bytes
SHA-256: 98aeaa63d47ef31e9b53440513cb60a585e116e92faa5b5e2cfcc2309ca8ca56