Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfc4577111543d7…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 15:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c93079ceea05843d371245f8f5c6d74 SHA-1: 119a36f1e053924457d7fcea16ed40a1fc565dd1 SHA-256: dcfc4577111543d77580e5788415b01bfc6b7d3a5075db4646ad5f79fa847b8e
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://leonvi.ru/award?keyword=doing+bayesian+data+analysis+2nd+pdf PDF link annotation
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/9010ab175d9c147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_604476b2484c9.pdfIn PDF document text
    • https://xeruterone.weebly.com/uploads/1/3/2/6/132680908/4988667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_60267a1c9aef6.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/6931632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486368/normal_602fd5fdd6838.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/62c89272379eff.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/naxezuropolag.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/cd359f6772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_600a466853a27.pdfIn PDF document text
    • http://namedaun.fun/8264718907722c9t.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/9c8611e9b.pdfIn PDF document text
    • http://idealslim-ordina.site/honda_civic_maintenance_schedule_canadai5pmy.pdfIn PDF document text
    • https://xukobali.weebly.com/uploads/1/3/4/8/134882082/gaxosovatixofanega.pdfIn PDF document text
    • http://load-bcp.com/66101067198rw0pz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0636a6b1-b0c9-4c43-847b-d05e4048a780/kaxegizufugimaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c63d6d-76fc-46cf-9aa3-5d0ca248dde3/what_is_the_word_memento_mori_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfc6b95-7e17-484a-8c83-5719c9f63a5b/8971627169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f49b5f-392f-442b-b4af-62756b3e92b6/69769782225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b4f691-704a-4ba0-9540-47ef5145f91c/casio_g_shock_watches_for_sale_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6a28a2-8032-4c09-b924-9441454e01ba/falukixozemiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03dbe51-e12d-449c-b262-9fabd8331121/62440523551.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_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 5488 bytes
SHA-256: 48c0525735a85ddd9430eedc9015fc8ea046f96d75449c805a1891df904092dd
font_01_sfnt_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 10632 bytes
SHA-256: 5f5b7151eaae477875fd1bfed78678ef5b97aadfbd5b0173d97939225cbb7ca9

Open this report in the interactive analyzer, or submit your own file for analysis.