Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01003d53c7e2d24…

MALICIOUS

PDF

85.9 KB Created: 2021-02-25 19:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e17dc9b57b7e997f3b1023a7ade838fe SHA-1: 22d94cd24122d0448f4cf947df98cd256b01ac50 SHA-256: e01003d53c7e2d2487499fa3ba293113296c39c108f13f3bba57b98baa6d30d5
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 embedded URLs, with at least one identified as a potential lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

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://maypoin.ru/award?keyword=is+zira+scar%2527s+mate PDF link annotation
    • https://cdn.sqhk.co/tevosudav/id8edji/rick_and_morty_pocket_mortys_apk.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/pawimis.pdfIn PDF document text
    • http://lalewenesuku.22web.org/crash_report_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_6000279f2b01c.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/je0gc2V/vineminarekunalefupod.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/iiSfifC/17221489059.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/bulonivabelesuviraviban.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hdghjau/nomatuguzasu.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/how_many_books_in_the_shade_of_vampire_series.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supetok.rf.gd/7087755258.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/response_paper_introduction_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/20510731251.pdfIn PDF document text
    • http://gitogopafo.epizy.com/game_burnout_pc_ringan.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/libros_de_louisa_may_alcott_en_espaol.pdfIn PDF document text
    • http://zelepabuvokus.rf.gd/primary_prevention_of_colorectal_cancer_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/zen_buddhism_books_for_beginners.pdfIn PDF document text
    • http://botalibinizor.rf.gd/madumavil.pdfIn PDF document text
    • http://nawatelobuj.rf.gd/kailanan_ng_pangngalan_worksheet_grade_5.pdfIn PDF document text
    • http://kopolug.myartsonline.com/2014_freightliner_cascadia_radio_antenna.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_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 4932 bytes
SHA-256: b23c75b624c88460bb187d60f058c75a33986f02ad33eb363e06be8e0b92cac1
font_01_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 9660 bytes
SHA-256: 32607e38138f0874f49b463251418cf32c55a501894c635f2b27d7c3b7626e0e

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