Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d3da858a7c86de…

MALICIOUS

PDF

97.8 KB Created: 2021-03-17 05:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54a01ead1d00f307c21c846ce93bd63c SHA-1: 54bd6225a7b07fd8ed63c019087a0f633e4da1b9 SHA-256: f1d3da858a7c86dedef7c1e7153a011b4592a3dbb80e0bc355892a2dbacbb1e6
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=new+york+grand+canyon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500187/normal_5fe9087e1b10e.pdfIn PDF document text
    • http://gk-kuban.ru/31215438823q0m1a.pdfIn PDF document text
    • http://nicepics.xyz/vitamin_d_deficiency_in_adults_results_inb38j1.pdfIn PDF document text
    • http://idealica-official-it.website/zuwunonaliwexhato.pdfIn PDF document text
    • http://study-english-05.site/tavofebnyeo5.pdfIn PDF document text
    • https://xibijogoxedugo.weebly.com/uploads/1/3/4/6/134662411/a2c102d2e969.pdfIn PDF document text
    • https://jefilixepiras.weebly.com/uploads/1/3/2/6/132681342/3646cbd774dfe.pdfIn PDF document text
    • https://siwapaged.weebly.com/uploads/1/3/4/8/134871660/7accdc6a9c685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502248/normal_5ffc2b247ef39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5ffe646672b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd313463c70a.pdfIn PDF document text
    • http://joy-todays.online/ledugiselejawacwx1j.pdfIn PDF document text
    • http://bezprovodov.guru/28544303733pinbk.pdfIn PDF document text
    • http://bazis-rostov.com/street_fighter_2_turbo_pc_freem41ys.pdfIn PDF document text
    • http://menformula.xyz/ms_excel_formulas_in_banglaeh5mz.pdfIn PDF document text
    • https://sufudavinor.weebly.com/uploads/1/3/1/3/131381021/9403012.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/siginulano-sevuferomijol-zufupaluri-nitav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_602d6152bcb98.pdfIn PDF document text
    • http://litvinenko.xyz/sistemas_de_manufactura_tradicionales_y_actualestc0xz.pdfIn PDF document text
    • http://it50save.info/266136061uhl7s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://refitebi.epizy.com/42336583516.pdfIn PDF document text
    • http://tabewozuzigenog.epizy.com/60391922110.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13489 4784 bytes
SHA-256: 2c33185c8f8466cb9c49b637e6b241c2dec5c04eea124216b7fb083f514573bc
font_01_sfnt_off000144ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EC 11312 bytes
SHA-256: 7853fc70b9fbe3fe2b09ba5830f71945bc3301ff11cb52bf35d06a0854017c94
font_02_sfnt_off00016b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B82 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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