Malicious PDF — malware analysis report

Static analysis result for SHA-256 477b4d917238e246…

MALICIOUS

PDF

42.2 KB Created: 2020-11-09 14:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 15bafae4bc6e644e983fac93c5132c4d SHA-1: 297626bc96711222130f5848004dd5610e20fc14 SHA-256: 477b4d917238e246ff29155097afb9d34c1da7a69459fda82d9e1c62d379fbbd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains like weebly.com, indicating a link farm or SEO spam operation. The primary URL, https://trafficel.ru/strik?keyword=west+coast+shaving+coupon+code, suggests a lure to a potentially malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/strik?keyword=west+coast+shaving+coupon+code PDF link annotation
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/jivegiva-wajitiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fa7647b3c66d.pdfIn PDF document text
    • https://kafubururi.weebly.com/uploads/1/3/4/2/134235359/jovijiboxep-vizifoxebiwulu.pdfIn PDF document text
    • https://jatolesaz.weebly.com/uploads/1/3/4/6/134645106/bd5eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f911294b05cb.pdfIn PDF document text
    • https://kufepodesaf.weebly.com/uploads/1/3/4/3/134336702/12e6ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8d107e2719f.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/03ee1cfb5a3.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/ganutimibimar_gaxagafomexakul_salibewulosiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_5f92c2ef83716.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/vuforewebub/18348773160.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/szckte_yap_konu_anlatm.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/gimurevetowufuduxikomeda.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/meseluzupesetifa.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_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5280 bytes
SHA-256: 6ee2480ff1bfaee3e7692a19496db782dd3fbbb1506c675f6699668c896c3132
font_01_sfnt_off000073a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 12188 bytes
SHA-256: 94bae581ac0344a3242b1b940340fcd4129f4d1a9a95c11e0044180993691c81

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