Malicious PDF — malware analysis report

Static analysis result for SHA-256 d197fad223c95b93…

MALICIOUS

PDF

74.5 KB Created: 2021-02-24 21:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 776daaaacf4646f55f58637e701a49a6 SHA-1: e7f6bae8a28f7272904b26685e78e2e8f78a67e5 SHA-256: d197fad223c95b932669f46f7225899c8c5f0a6f1dd312afdde044fb00f40040
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one prominent URL identified as a potential lure for users interested in security impact analysis. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The presence of external URIs and link farm characteristics suggest an attempt to redirect users to malicious content.

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://druttle.ru/strik?utm_term=how+to+conduct+security+impact+analysis PDF link annotation
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/06617b.pdfIn PDF document text
    • http://doorstepcomputers.com/lazatednjn6e.pdfIn PDF document text
    • http://fabulouss.space/windows_7_activate_key_freerbr0g.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/lekuwepizezonif.pdfIn PDF document text
    • http://segepivo.22web.org/blaupunkt_bp_2._0_fhd_instrukcja.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/720520.pdfIn PDF document text
    • http://jibesikore.iblogger.org/old_ariston_oven_manual.pdfIn PDF document text
    • https://janonezofeto.weebly.com/uploads/1/3/4/6/134664798/9c64fd.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/seriposuj/chokher_bali_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/ikea_cabinet_knob_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/mla_format_8th_edition_works_cited_generator.pdfIn PDF document text
    • http://pozimewugojezi.rf.gd/vba_reference_cells_in_another_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 5376 bytes
SHA-256: ed8938400b92e68faa34e1217dc52585258db02f3278c05288d64a652c144d24
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 9968 bytes
SHA-256: 2cd8afd278e7c30d7d844a6556ee889d01ecdee6453a361150a67f0eadc464c9

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