Malicious PDF — malware analysis report

Static analysis result for SHA-256 64717c4659c96dd0…

MALICIOUS

PDF

75.6 KB Created: 2021-06-03 19:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59bd65ba8dc8a01d221f768ce942f33f SHA-1: dbcbab6a35777d7cdaed6237426150f33c0ac62c SHA-256: 64717c4659c96dd0e00c87d087dddea4442d904373903cf8874b762a7ef35a9c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crysiq.ru/pbw?utm_term=arctis+pro+wireless+settings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459025/normal_6068cf04c8e0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451971/normal_5fee667c813b2.pdfIn PDF document text
    • https://vuvowopivuvi.weebly.com/uploads/1/3/1/4/131410126/1875640.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/ad86d05fc60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fcbd645955d2.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/vaxenapurobej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_604758a3ede34.pdfIn PDF document text
    • https://dovesexafonom.weebly.com/uploads/1/3/4/7/134702519/relup-sikupopizonifi.pdfIn PDF document text
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/rirobinudazokoniga.pdfIn PDF document text
    • https://golobixapisiz.weebly.com/uploads/1/3/4/6/134653183/1c012c56f4df16.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/7577117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_60143be88d544.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/5895686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_5fe7c14621471.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/vojipu-tazorotomotixez.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/sixefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426974/normal_5fd065105fa68.pdfIn PDF document text
    • https://vusuvokitajize.weebly.com/uploads/1/3/0/8/130874031/jisalinevuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_60341b73a381b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_601f0cddd4e36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulasamesi.pbworks.com/f/fozadunewad.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144484752/dodujiruxumerajamev.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_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 4972 bytes
SHA-256: e95145579ddf2101b4e6da1895d24bcf2bffed04640bff81928705651050a323
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10984 bytes
SHA-256: ccfaa7afc21ada963d84ee7893c97d00d4e232463ae5d15bfdf1fce3bc0eabaf

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