Malicious PDF — malware analysis report

Static analysis result for SHA-256 4084c1e58a64edbb…

MALICIOUS

PDF

65.2 KB Created: 2021-02-24 01:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa27e8ede070c952799e8487104738dd SHA-1: 5ee4e5a815db1b5a2aa6cd7c35c90c73d5aaa87b SHA-256: 4084c1e58a64edbb51fdb74f3fbd640d372ce84d79af5ade63b4ac3487100322
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=shop+vac+90304 PDF link annotation
    • https://cdn.sqhk.co/tejosepu/hgiSibP/never_have_i_ever_cast_benjamin.pdfIn PDF document text
    • http://vbruti.site/jikekipexefunetjeqw.pdfIn PDF document text
    • https://fufilotaniwa.weebly.com/uploads/1/3/5/3/135321354/ridigijogoduz_tekope_mupejatux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381762/normal_5fffd6e0e4b2a.pdfIn PDF document text
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/zalaruwefapiz.pdfIn PDF document text
    • https://pejagefetem.weebly.com/uploads/1/3/0/8/130815482/b0337.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/vilit-nobeja-fudisudu.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/gotefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fe6f7b019fbe.pdfIn PDF document text
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/4cbdb92e9e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_60317fa17305d.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/cDPC1Sp/vuwujewumawajo.pdfIn PDF document text
    • http://fdvsefwfrw.space/28939356658iw4bu.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/gokowuvaduzawo_tunub_mulexajaxasasi_lafomutozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_60207dc8a6572.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/Mk2gihJ/nomale.pdfIn PDF document text
    • https://fumuzuwuwuwupu.weebly.com/uploads/1/3/0/9/130969925/e7b6447030.pdfIn PDF document text
    • http://file-id.ru/othello_summary_shmoopew14u.pdfIn PDF document text
    • https://limezisetuf.weebly.com/uploads/1/3/4/8/134871661/xovexuzoxaf_gatopebo_genokumu_divim.pdfIn PDF document text
    • https://nezovudaposuru.weebly.com/uploads/1/3/0/9/130969726/59a0e08eb5b00a.pdfIn PDF document text
    • http://flowerport.market/jami_bayan_al-ilm_wa_fadlihir9nmn.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/9759225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC373 5428 bytes
SHA-256: 06dcb030db72134da73e5a2028d03ab924ec5f44ec1c3756441d2b4c3c6f9439
font_01_sfnt_off0000d5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F8 10076 bytes
SHA-256: 2195f7c7b55dc503cf3ff12a2d165b1b5209ffed7bf0887906a58b7119f573e2

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