Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc96bba1185a6bc…

MALICIOUS

PDF

90.5 KB Created: 2021-05-02 20:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2234ff253c64b4635d91adaaa8270a73 SHA-1: a5f2808f789d3ee73d260c1fe23bbbcb4dc1cadd SHA-256: 0cc96bba1185a6bcb1ca92c9bd4ad4194f56225e7a680214762a4c58f858d894
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that redirect to external websites, one of which is identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, appears to reference 'Romeo and Juliet' and 'quizlet', suggesting a social engineering lure to trick users into visiting the malicious URL.

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://ponafet.ru/strik?utm_term=romeo+and+juliet+act+5+scene+1+and+2+quizlet PDF link annotation
    • https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/f0b09635.pdfIn PDF document text
    • http://discovljzg.fun/vuruwizaduninexesitykfbb.pdfIn PDF document text
    • http://excschool.ru/89572183747247sk.pdfIn PDF document text
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/3db40.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/2992797.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/94525044910.pdfIn PDF document text
    • http://biteroz.iblogger.org/best_hcg_p2_recipes.pdfIn PDF document text
    • http://legibovusapezo.mypressonline.com/gejaxojajikuseve.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/bosuxukowuko.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/23173512664.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/6515e2ea4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuxewetim.rf.gd/ludubafu.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/6196387429.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/metudawekop.pdfIn PDF document text
    • http://junakaz.epizy.com/tekakip.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/authorisation_dealer_certificate_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8af49d-5251-493f-a60a-53021bae207d/kodixunawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d44d97-25e9-412e-93c6-d2d42414861b/fojitexix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b14ca0-c478-4cb1-bbfd-35d42510d82f/does_a_letter_of_consent_to_travel_need_to_be_notarized.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64d04f4-f2b9-4614-b32e-759a0d419a17/smart_watch_m3_vs_mi_band_3.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/tisawowatari.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 5556 bytes
SHA-256: f06595f3074ca3cd0022da342dc46e3d85d7f8d89d3409a6f5cf45fe2dfbd852
font_01_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 11852 bytes
SHA-256: 293ce2ab0e7b81751c87dfff80a33c9a8e19d437aca9a229ee8c32405528e3ff

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