Malicious PDF — malware analysis report

Static analysis result for SHA-256 6108f38428383411…

MALICIOUS

PDF

74.6 KB Created: 2021-04-14 05:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e51b80b4988b85d7002ccdf9bc64ae11 SHA-1: e2368ade58dda5a1053529b9365bc40af8f4b1eb SHA-256: 6108f384283834116ed10a335c50ad91659d54fab93483676287c22ad8448585
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 0.9998

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://jacksth.ru/strik?utm_term=que+dia+feriado+de+carnaval+2020 PDF link annotation
    • https://cdn.sqhk.co/vibebexez/gjvHhAT/xebutexezumemavumubilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426073/normal_5fed3f3033282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_603f602842333.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/dosado_sujabop_gadisu_jejopi.pdfIn PDF document text
    • https://livurexile.weebly.com/uploads/1/3/2/6/132695833/xefesogexo.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/jh6ibge/khloe_kardashian_photoshop_vs_real.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/kalogobobixeta-jakizudiguga-nugarejus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_601639a5a5e76.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/gdgm1gh/super_salon_game_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/4hcPijG/rebuilding_paradise_documentary.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/gawuvebinaviva_laburigaruse_nufoz_xoput.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/Whdha4H/roxajetixaweniju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_5fd0ebceb6e78.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/j6jaofI/battery_doctor_app_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_602b780c6c76b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fe611c35e8d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fe8beafae5c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_4ced1c2e77114e6c9496c4ea4c712445.pdf?index=trueIn PDF document text
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_3d676c51af8d46fd82e920353a2b2db8.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

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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 5232 bytes
SHA-256: 667e20547a217feef7151f73cb9b5cc24d0c2ce6a29bd698f8f2768a858b1e2e
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 11044 bytes
SHA-256: 21112abeddee350d36315f089d6c459967e8e8f248c2e7739a982becf9745bbf

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