Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0808a259e4f4f1…

MALICIOUS

PDF

74.9 KB Created: 2021-04-23 03:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63d24bbb33a9e1fccfe86f18faa8fccd SHA-1: 5450ddc7d41318201639d686feb848bd077e656f SHA-256: 6c0808a259e4f4f1d644aec32879ca0c371aa18c99c89ea333dd42b9e34f6996
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://pelibifir.ru/strik?utm_term=calculating+molar+mass+practice+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404750/normal_603e78a09f211.pdfIn PDF document text
    • http://beamorem.com/why_is_the_garbage_disposal_leaking_from_bottom6fvf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_600a57ea35e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5fd1386a7612f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_605712a39183f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461201/normal_6004bf9841988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_601d1898e08da.pdfIn PDF document text
    • http://duwadomet.22web.org/sorovepelolad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_6045053588ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_60531652b3a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fd68b45de9d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_602d931cdc7ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389797/normal_5fd0489018243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_6041a531e58b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471969/normal_5fe1248a3fd1f.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/806576681450fmmx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_5fd0864d504d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5fe3f16e9c4a8.pdfIn PDF document text
    • http://ninarekazo.iblogger.org/49904558460.pdfIn PDF document text
    • http://meriline.store/salvator_rosa_the_death_of_empedocles1fuc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajajuladepume.rf.gd/gelipemariregoxilitet.pdfIn PDF document text
    • http://gorevifero.epizy.com/tekewupagaxuxutefi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE939 5408 bytes
SHA-256: 88c6916e45f65034a48c01248de3b782486ea8d0de564a80a5cba7c16dfa3bd7
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 10148 bytes
SHA-256: ba092ea6fcaa92c1860756c0f357e904d54addc7c1b66d7197e13d276358776f

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