Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce182aa54026aaf2…

MALICIOUS

PDF

104.0 KB Created: 2021-02-10 19:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5bc469cd28bc8e14e1bca505d252027b SHA-1: a30538a08029a1638f629c2f59e777c7e1f6a6d0 SHA-256: ce182aa54026aaf2bc30d910b4fa3ee9616b0a32b4fb8edc4782828e1a306c1c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

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://bologen.ru/aws?utm_term=doctrine+of+justification+by+faith+pdf PDF link annotation
    • http://taxiditugivubed.iblogger.org/bugedi.pdfIn PDF document text
    • http://gimepar.22web.org/23755207579.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/auf7Efh/refaxap.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/85981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_60168cee0d8c9.pdfIn PDF document text
    • http://xuxisozolawub.22web.org/agregados_monetarios_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_60241200d0c79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5ff4cb61b9538.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/jifiaHS/usa_today_sports_nfl_picks.pdfIn PDF document text
    • https://molapoji.weebly.com/uploads/1/3/4/0/134096941/3246905.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/vewomafujizupipan.pdfIn PDF document text
    • https://jimukara.weebly.com/uploads/1/3/4/2/134235432/zamawekosumosebomiza.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/pusori/31833839421.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/characteristics_of_good_research_report_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/bets10_giri_mobil_apk_indir.pdfIn PDF document text
    • http://kodibonu.rf.gd/enga_karuppasamy_god_songs_free.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_off00015bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDE 5528 bytes
SHA-256: fec0ffdbad779bb60bfa0cb16cc3aeab3c808ff4727a095f07e6255675e4528b
font_01_sfnt_off00016eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB4 10724 bytes
SHA-256: 39a5ecf4d70594782b534ce312fc069f79f3939063f64ff044102f66e429664a

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