Malicious PDF — malware analysis report

Static analysis result for SHA-256 e123e9ae05cfbd25…

MALICIOUS

PDF

74.3 KB Created: 2021-03-14 19:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: dc9a2a845071338296919bfcfde92d62 SHA-1: e1d934ac723ccc9bac67d247645277e4e4a38d6f SHA-256: e123e9ae05cfbd254a09804bafcf46cfc7ae3cb0d398b0f1bab2c351a6804db7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=essential+and+nonessential+clauses+quiz PDF link annotation
    • https://cdn.sqhk.co/pelotuwew/3ibLYhh/baseball_9_apk_mod_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_600d43a448a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_60337f1fae704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_604ced90adc6d.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/jusirafanavikofek9vx1m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465123/normal_600e13a553cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_60241eca2b6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_601a9a040ebca.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/hhbgfgc/mifiwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414500/normal_5fddffff12b10.pdfIn PDF document text
    • http://bitsracing.net/18596107673tnlc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_6034f7e941bca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5fe542fbeceaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_601e198bded59.pdfIn PDF document text
    • http://216tilford.com/18122434046sp5mx.pdfIn PDF document text
    • http://pycnidwzxc.info/kepasopojokipemozih46qb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_600c9e51acb3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425737/normal_5fcb11d3e2c5e.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/dhgpEKm/mobile_phone_number_format_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/ODhhAyu/insurgent_movie_in_tamilrockers.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/jiWsjcI/30990039143.pdfIn PDF document text
    • http://rerubin.space/35581658519cwi75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/annotate_secured.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/futuziga.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/javascript_code_formatter_vscode.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_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 4968 bytes
SHA-256: df7b7ca7509e56519e0e7de7b2b867bc6b247d6c47a187a02928dd8cca07c37f
font_01_sfnt_off0000f61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61F 10880 bytes
SHA-256: 46f45099099e4c7679d011436082b03d542c44420f8937efe3fdb69da153bae2

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