Malicious PDF — malware analysis report

Static analysis result for SHA-256 443575315e57b4ee…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 13:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a330f58c5e050910458e4309b21c1c03 SHA-1: 9b8de4f6a748a41ac02cfc9cd6783bcea0b87f9d SHA-256: 443575315e57b4ee2987ee4144f8351799d2b0fa234646bb82fbe1a84467b3b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://mezovuduw.ru/strik?utm_term=popcorn+flute+sheet+music+christmas PDF link annotation
    • http://art-practice.org/264509367834d9vc.pdfIn PDF document text
    • http://zoomita.fun/gobepimusal5ps8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fd3072f3d8af.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/55107234573.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/maytag_quiet_series_300_no_water.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_6043c1bf12295.pdfIn PDF document text
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/8a0650021908.pdfIn PDF document text
    • http://freedate18.xyz/bhangra_paun_de_song_djpunjabfez32.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/daset.pdfIn PDF document text
    • http://marafonsport.site/34612075246cljvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5fe3a03a2de94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5fd8d310aba39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fe53808575e9.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/63514170773.pdfIn PDF document text
    • http://paksorond.xyz/tatisisiwexu4gy1f.pdfIn PDF document text
    • https://pobivizitonep.weebly.com/uploads/1/3/2/8/132815986/1747980.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/wovunivasexala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_b0fd7fd05534425c983f45a87f04ba96.pdf?index=trueIn PDF document text
    • http://pujumek.myartsonline.com/how_to_check_coleman_mach_thermostat.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_3dfa172eb4864530aeb76dc8a3e2de99.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_9243e59154174f81bfb2628e12dbcdcf.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_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 5256 bytes
SHA-256: f4f859be7cad1af2389a1340c19df71441eb9c127b2afa13a20a4781dfd00b8d
font_01_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 10744 bytes
SHA-256: f6c6abb6c895f5b066d6a66014a101e09e977b57376f895f5c8a8d11fc3c6552

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