Malicious PDF — malware analysis report

Static analysis result for SHA-256 814e17eea9f0690c…

MALICIOUS

PDF

78.6 KB Created: 2021-04-12 06:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c7630099f0926ac8c264bca63e3815e7 SHA-1: d5ca4f5bfaa2a5059897f334f17eb4e64995f534 SHA-256: 814e17eea9f0690cb5ed7706a7feec98bcbe1fbd8029af18633ce7de378f2abe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs, with one specifically designed to mimic a search result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=what+does+the+fig+tree+symbolize+in+the+bell+jar PDF link annotation
    • https://cdn.sqhk.co/kagaxavog/degPieA/marketing_campaign_execution_plan_template.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/roxewe.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gd6jgNU/20221160787.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/a_fair_days_work_meaning.pdfIn PDF document text
    • http://istlan.space/secrets_of_underground_medicine_dr_warburg8cxpk.pdfIn PDF document text
    • http://vamoktin.ru/95068654465hguzt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepusum.onlinewebshop.net/wiwebetolifo.pdfIn PDF document text
    • http://woniziraf.epizy.com/dementia_assessment_by_rapid_test.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/texas_instruments_ti-nspire_cx_cas_usb_cable.pdfIn PDF document text
    • http://sivuxapujareza.rf.gd/eye_reading_body_language.pdfIn PDF document text
    • http://mogixos.atwebpages.com/61150755469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982d42c6-2520-4e55-807e-51bdb96627d0/atkins_physical_chemistry_10th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5e018c-a522-432f-8a92-66de4132e563/potunapajinaped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012b7365-05fd-40ee-b72d-922407c12e0e/do_post_office_have_passport_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f31472-4347-49b1-b363-deb3ae50517d/how_to_build_mental_toughness_in_young_athletes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed65d27c-4b77-4b10-b977-3a4aca683fa8/rojufo.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_de69dc05043a4938bab66e88b53ca91d.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_4542f0b4f5f342efa3cabd054b9d4f87.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 5700 bytes
SHA-256: 0ea2cb05b102e900819ece0df0921ed345b72dd3ea11d3e7aebf071d817d8afb
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 10968 bytes
SHA-256: 5bba8dd3716834942aaf5116190ebd18dadc788efd65e4a07c2e6566d901d9ef

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