Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a74ba850a8d21e1…

MALICIOUS

PDF

96.7 KB Created: 2021-03-14 04:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d44229e328bc6cc31975def642b40430 SHA-1: 09b2f8dd380e579f8685878bd975ab86edb7483b SHA-256: 0a74ba850a8d21e114723e65d717f7c77225c1c445c7f1cb7e9376a2123eeb08
186 Risk Score

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 0.9997

Heuristics 6

  • 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 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://lozipotod.ru/wix?keyword=entropia+universe+guide PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/heifMTf/escape_plan_3_trailer_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/zereseful/jfijmgh/32796037322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489588/normal_5feb9b9976b52.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/padobexar_rowatisuzud_pelepinuj_bokovodifag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_6025d065f1fbe.pdfIn PDF document text
    • http://paselon.getenjoyment.net/rukisabisisobonemolokiza.pdfIn PDF document text
    • https://zuzameponotu.weebly.com/uploads/1/3/1/6/131606203/lefamapowu_toxirasukila.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/4329543.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/what_is_the_basics_of_agile_scrum_development.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/8f657956.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/6ihJjd9/voxubelimogazodolimuvivo.pdfIn PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/dimogurekorizep.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/72bb0ce19.pdfIn PDF document text
    • https://cdn.sqhk.co/daribugubive/3nijjUy/herald_trumpet_fanfare_sheet_music.pdfIn PDF document text
    • http://vutunema.mypressonline.com/wenogidubejejesimoleluv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_d3bfb5465ba8465596329adef0f24d1b.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_ee07a9c355c143539fc5cdd37928ae25.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_c1298b98e9594bf58eea93185780d177.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_5a99ee68fd734810a42a63a6960cc6f8.pdf?index=trueIn PDF document text
    • http://witesenigo.atwebpages.com/jidodumilusudanusejil.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_b8a59c7087d64742b67dfc8b6ff27eae.pdf?index=trueIn 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_off00013db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB9 5112 bytes
SHA-256: fede1f793871e81490acfa13e71df35828fb0f9d64df311298012f7515a11b38
font_01_sfnt_off00014f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F31 11312 bytes
SHA-256: 61ad94f08286c43e3d1837071ccbb9ecd161fa47a36e50c9cc676a81ed28196e