Malicious PDF — malware analysis report

Static analysis result for SHA-256 5782527d549cc442…

MALICIOUS

PDF

81.7 KB Created: 2021-04-25 09:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7095f3a98c6684ed7d81047521229931 SHA-1: 2a7499bf2c703b1b2b3c8f6f0eeb01e04613d53b SHA-256: 5782527d549cc4426dc24b64dd62b782154dc9a5b7b6c3d6f4837acba4867a1f
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 0.9998

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://leonvi.ru/strik?utm_term=sociological+imagination+summary+chapter+1 PDF link annotation
    • http://kixurox.getenjoyment.net/adverbios_de_frequencia_em_ingles_exercicios.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/what_are_the_levels_of_organizational_culture.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/kalender_2020_free_download.pdfIn PDF document text
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/21d753772b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_6011f37f505cb.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/campaigner_personality_type.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_604e085d39b31.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/5035305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5fe26b8f69f8d.pdfIn PDF document text
    • https://ralufuluwifo.weebly.com/uploads/1/3/0/9/130969066/bamibojononaxugobig.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/zigaza_borat_bixegiriz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5feb95dbe5e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495393/normal_606ad70a075c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_1d6f1f2e7e564cb0af94ab19a2de1f24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c820d5fa-73a9-4463-a57e-ec5bcce195d0/barb_the_ape_from_cloudy_with_achance_of_meatballs_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852bbfc1-4fde-4b36-8381-be090ee9e3c6/putimidilabaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166c4190-cdf4-4a37-ab6b-00868cd7387e/chemical_formula_and_composition_of_vegetable_oil.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_8e7e9b4e97524ea4989907626612b814.pdf?index=trueIn PDF document text
    • http://tosurok.myartsonline.com/86344173761.pdfIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_98ead05b69a4405c8015ed7faea36b19.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_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 5604 bytes
SHA-256: cf7108364e7d9414dd55678fd1ce6e8cab9298a654c32e6ff19a8356ecc04615
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 10776 bytes
SHA-256: 402501c45ff1cb281ebbe42f695034e5e9a5c7fb297f17cec1ea28657bb1b6ed

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