Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e52c85357c542e…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 08:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 02f754f102b4108f3bd77129b67e65cc SHA-1: 149ed282f59edf3fcf91419328330a8fac18351f SHA-256: e3e52c85357c542e52328cc13b76540beff85c1587f524c9c0cc7c6ac67a040b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=heart+of+darkness+summary+part+1+2+3 PDF link annotation
    • http://lutunabobofipus.22web.org/mosogemowinunelanewav.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/fly_sheet_book.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/mathematical_modelling_nptel.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/427889659ce.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/zofitedesina.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/srimad_bhagavatam_malayalam_download.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/tidasuriwileworim.pdfIn PDF document text
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/vokisatemosuwaz_lorimarorar.pdfIn PDF document text
    • http://trikolor.site/7996709359wwybi.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/433039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5febfcb7ee036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_6046bbf3c8d9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fe41876aa827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_6008698f2c2e1.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/16920638425.pdfIn PDF document text
    • http://antonio-ita.space/bovegogimolawodeto11z7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_605966f2b1688.pdfIn PDF document text
    • https://rofipufexorijol.weebly.com/uploads/1/3/4/6/134656377/6334163.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/gulaxukanimuxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/sikaxebupe.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/komobod.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_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 5632 bytes
SHA-256: bddd9733c8c79147a522a3f273fab149f1e35c009c01c08d31ad26130329b3c6
font_01_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 10236 bytes
SHA-256: fa1e601e1b2003e421cf2bc088bfe9eb3cf0b65e7b7d618882242ec76ee5b31d

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