Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e49448b6612805…

MALICIOUS

PDF

80.1 KB Created: 2021-03-15 21:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca0ee49f710029a03475a78e6365291c SHA-1: dadc45460d088aa0c7cf0090d58962132432ae65 SHA-256: c7e49448b661280550308d09ac39aefd98401482013d6c75433af1a8e1300907
134 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. It uses an invoice-themed lure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/wix?keyword=estimate+terms+and+conditions+sample PDF link annotation
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/6547722352.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/0dd6efe5.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/03687c956273dd.pdfIn PDF document text
    • http://mosasekoz.22web.org/10551751044.pdfIn PDF document text
    • https://wewogubebomev.weebly.com/uploads/1/3/4/6/134692169/6982870.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/07583.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/nafolote.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/36807421457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d82a27-2e5e-4640-90f3-e52018bce4ad/vugikixibovude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764f5701-ab0d-4789-92a6-44f5af0e893d/vizio_e231-b1_remote_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b74855d-8ca8-4790-a575-815275ae919c/nuzukud.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/5274826068.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/58907065151.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/relaxation_techniques_for_stress_relief.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/metric_length_conversion_worksheet.pdfIn PDF document text
    • http://tinegomawula.epizy.com/medical_tourism_book.pdfIn PDF document text
    • http://sufafawujufex.epizy.com/69546576618.pdfIn PDF document text
    • http://zilidezokap.epizy.com/vixinugiburasaxun.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

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_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5176 bytes
SHA-256: 8a24a3888968b1e935522762b32510aecee18d2e35357190f078709f9849cd04
font_01_sfnt_off00010b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 12004 bytes
SHA-256: e5a836dc27abc1c9647bcf7b95126d035e60dbdcfa06c7fd4c5c24d3a4f4f229

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