Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58f8baa07554ca1…

MALICIOUS

PDF

71.6 KB Created: 2021-01-04 01:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9f9890596ae96349041a73eec70fb257 SHA-1: d8bbbe445e9cd4a4ee826d7cc04c5de17b4c570c SHA-256: b58f8baa07554ca14b8281bc1f1f5ce8dbb0204227f1426fb95dc91e0e177d21
126 Risk Score

Malware Insights

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

The PDF contains multiple links, including one that purports to offer 'Ableton free for windows 7', suggesting a lure for potentially unwanted software or a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of numerous external links and the nature of the lure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=ableton+free+for+windows+7 PDF link annotation
    • https://guzugalaxob.weebly.com/uploads/1/3/4/7/134767263/2417437.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/jcpgfhd/the_maxwell_house.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/2798932.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/6079217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fd787667bd6f.pdfIn PDF document text
    • https://cdn.sqhk.co/lidabofob/0iaFjiz/wafopijapopivobajakoxog.pdfIn PDF document text
    • https://wibagubid.weebly.com/uploads/1/3/4/3/134373733/buduguvem_pelaxinudi_kavogasevanopum_fejiruwisorupe.pdfIn PDF document text
    • https://zenamuvevabun.weebly.com/uploads/1/3/1/4/131453902/gotovudagofadobisa.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/4196788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8e750fcf053.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/QPicUiw/siren_head_field_videos.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/jowiginolo_gigisugel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 4992 bytes
SHA-256: 72bff217fda00076471faad92e06740c00f5ea180262fbf4b713b495c56382ba
font_01_sfnt_off0000ed71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED71 10680 bytes
SHA-256: ca337e042fd9f918cd26e659a55e0e963e8706dd637ac190e7d4e1ecccae44b4

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