Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf386b5e5e4f217…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 06:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a29bdce5de6470d46d7f5de01866b0dd SHA-1: 9cae5e7f4b4c0391cd6b8c9dc5e99d74bfb85b84 SHA-256: bcf386b5e5e4f217720c289c7c221867ca5a29b3c9d5d77f7330ec037a42a66d
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-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.
  • 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://resalured.ru/strik?utm_term=dbt+how+skills+pdf PDF link annotation
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/7295d81b9783d14.pdfIn PDF document text
    • http://radanews.site/zekekobupobufuj36z6l.pdfIn PDF document text
    • http://rezltml.xyz/tijitifovarawitoxekubem94h54.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/sagipif.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/mitovinusisuzija8l8yq.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/riwotobejilumas.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/xanamez.pdfIn PDF document text
    • http://thecet.xyz/john_deere_48_inch_deck_belt_replacement4412z.pdfIn PDF document text
    • http://hr-insider.com/sushant_singh_rajput_ringtone_pagalworldk29sy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fd665402d332.pdfIn PDF document text
    • http://stroymarketmetal.ru/bahubali_2_tamil_movie_ringtonecr205.pdfIn PDF document text
    • http://secureappeal.com/54018890890msqjw.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/podinur-liliru.pdfIn PDF document text
    • http://scoretdho.best/1058171193iks5l.pdfIn PDF document text
    • http://tafasizogir.22web.org/33507489366.pdfIn PDF document text
    • http://chistohome.moscow/62798958405x3t7b.pdfIn PDF document text
    • http://nodujazaso.iblogger.org/xofofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_602a84a299a99.pdfIn PDF document text
    • http://momentshop.space/netgear_n600_modem_router_price8fznz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mizabox.epizy.com/dukakidisije.pdfIn PDF document text
    • http://mowubuzedolilaf.epizy.com/boxer_shorts_sewing_pattern.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/wadigiwolako.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_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 5116 bytes
SHA-256: 0158f22f1602bdfa6677898554b155ec564ded19f3546834a0ec8c31ddc41a17
font_01_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 10784 bytes
SHA-256: 00ecc41209fdcf9cf389b73465d59d8061898b06108ecfb726de3bb51c3b0f8b

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