Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d02693dc074a2fe…

MALICIOUS

PDF

86.4 KB Created: 2021-03-14 10:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 597dce1690a82c8d31b8feba4b5d2fd5 SHA-1: 88ba11c2a6f357ef34dbceab818a13affcca29af SHA-256: 4d02693dc074a2fe88031d0924c7652c9336926ef196a34925cc5343e70b32d3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are designed to redirect users to other malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely serve as lures to download further malicious content, such as the 'grab apk 5.128' mentioned in the document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wix?keyword=grab+apk+5.128 PDF link annotation
    • http://newapegujopabi.22web.org/xubunakudabozoxogoviwuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/ijWjgva/84671417777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_60347b7d25dad.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/8914311.pdfIn PDF document text
    • https://pixokunotozonux.weebly.com/uploads/1/3/4/0/134017876/ded637654d508.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/fgcjiy5/kunibaxopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_602b702f32837.pdfIn PDF document text
    • http://sabaroxuxonefib.iblogger.org/compare_scarlett_2i2_and_2i4.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/h2Fm3JX/49483101304.pdfIn PDF document text
    • http://givepamodugag.22web.org/rizonu.pdfIn PDF document text
    • https://cdn.sqhk.co/budijapa/hjgfkjg/76739980346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_604afc3a1a3af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_6035f3cfc8c4b.pdfIn PDF document text
    • http://vuruvuzivad.22web.org/57066993248.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/lilejakob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe6d96fd7352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xirugole.epizy.com/kefezofepavixatapo.pdfIn PDF document text
    • http://bukulifuxevet.rf.gd/99772976299.pdfIn PDF document text
    • http://jikapepikedamum.epizy.com/48237726078.pdfIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_34f0620f62e9419fb16cd726dfbca4b8.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_e07933430f46462fb146c304f928ddff.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_89d81f46ff5a4fcc8a1012eba9f78603.pdf?index=trueIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_cdb7d45f11c4477e958f5d48f2377548.pdf?index=trueIn PDF document text
    • http://rasunafosav.epizy.com/xetupururejozebedujutivu.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_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 8380 bytes
SHA-256: 809ee868f5ace3e9123da4b6087a3a48e477aa1adb7f39b0267a7709b4873bd3
font_01_sfnt_off00011581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11581 5372 bytes
SHA-256: 42e8190f844ccf3dafd647c051f2a0c2506f3a191d495f84457ebe29f38a760b
font_02_sfnt_off000127e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 10588 bytes
SHA-256: f0d4b641460d661195e127c0826ed118893163aed10d6efc217640516dbd9a87