Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b793450f225788…

MALICIOUS

PDF

73.2 KB Created: 2021-04-03 09:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3f2e31280fd2251fa4b9d7e6f273d8b8 SHA-1: 535d8dd3e067a3aedd545df66db62a703325d7b8 SHA-256: 72b793450f225788906252aea271da7af0028655e33f9af03fdd9d7c1dcd1ff8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to various disposable domains that host further malicious content, likely for phishing or malware distribution. The embedded URLs and the PDF's structure suggest an attempt to exploit users through deceptive content, masquerading as a book download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=are+u+afraid+of+the+dark+book+pdf PDF link annotation
    • http://zaketukurokisof.iblogger.org/femewukuz.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/gajewawelulubodugego.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/Edjjjhh/midalutipogabojuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/eibjb5R/11434171172.pdfIn PDF document text
    • http://metarapuw.mypressonline.com/2919889563.pdfIn PDF document text
    • http://fuxagiwowasiwu.22web.org/abbotsleigh_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/iihbEje/vitugikekorezuxagugejakip.pdfIn PDF document text
    • http://ferunasivagu.iblogger.org/zazulijavabagifako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desujiruvomeb.myartsonline.com/axiomas_de_zurique_download.pdfIn PDF document text
    • http://fexomuwitoxe.rf.gd/kimijokidomejid.pdfIn PDF document text
    • http://sejibuka.epizy.com/set_up_icloud_account_on_android.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_e4f6834ace7b4596a9a113392a2d348c.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_0d8d4492a8904b99a346fd5c7a1305bf.pdf?index=trueIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/courage_brother_do_not_stumble.pdfIn PDF document text
    • http://wikeratofi.epizy.com/wondershareelement_ocr_portable.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_70f0918de0b14548ba88ce021932857b.pdf?index=trueIn PDF document text
    • http://luredavum.epizy.com/befodifufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d52120-53a1-4156-8bf2-5d6aea2bf9c6/cal_spa_control_panel_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db965ab3-46a8-4173-b2bb-f775492e4d1d/43831979124.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_a785559d370745c284a15c11982e33a2.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_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5112 bytes
SHA-256: b842853628e6131de1c9596385df6b8c9bf6d68ac8fb71891641a54f170a7efe
font_01_sfnt_off0000f3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 10400 bytes
SHA-256: 7184ba5952adc509cc27411852610c075196d11221284814ec2282059e239722

Open this report in the interactive analyzer, or submit your own file for analysis.