Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebf5be15fa84b56…

MALICIOUS

PDF

76.2 KB Created: 2021-06-09 13:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1acd644a83ef0378d5832a3d1254293c SHA-1: 3e84438f98e97a6473071bd44361983f50fc3a12 SHA-256: aebf5be15fa84b56595a5d23a45362fdd8a1f7f9e00fd476ba13d6b32c3f08f7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier. It functions as a link farm, presenting numerous external links, including one for 'minecraft 1.17 free download for pc' which is likely a lure. The PDF contains a large number of embedded links, many pointing to disposable hosting services, suggesting an attempt to distribute or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://wastran.ru/pbw?utm_term=minecraft+1.17+free+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456663/normal_60584f9b55b5f.pdfIn PDF document text
    • https://garixapevawena.weebly.com/uploads/1/3/4/4/134495328/6a9692ceae0.pdfIn PDF document text
    • https://zurufapejol.weebly.com/uploads/1/3/0/7/130739524/1562063.pdfIn PDF document text
    • https://puxokobipo.weebly.com/uploads/1/3/4/5/134524361/gamamumobifit.pdfIn PDF document text
    • https://zinalojirade.weebly.com/uploads/1/3/4/2/134266028/zurex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_605853b560cf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491669/normal_5fc9beab99c3a.pdfIn PDF document text
    • https://kifowufowuvix.weebly.com/uploads/1/3/5/3/135392599/bepomepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_601c8d36e764f.pdfIn PDF document text
    • https://bafupenog.weebly.com/uploads/1/3/4/1/134131575/8691820.pdfIn PDF document text
    • https://fupobemoxu.weebly.com/uploads/1/3/4/6/134669325/3267567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_600c701460d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_60bb1a79d2b9a.pdfIn PDF document text
    • https://ritidajadufe.weebly.com/uploads/1/3/4/6/134622671/2135194.pdfIn PDF document text
    • https://tikodukika.weebly.com/uploads/1/3/0/7/130776738/ludifaxixawepinirub.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/9893826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497110/normal_6017c252cfe1b.pdfIn PDF document text
    • https://kinofipu.weebly.com/uploads/1/3/4/7/134725163/motarufazuni.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/siwusovupisof_luwuleresikax_taluwebobesun_xonorasozak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_6063ba1658347.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d324cb-66a4-45a5-ada6-74c2eddb4f3a/how_to_do_citations_in_word_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df30b730-4ea4-48a7-bc4c-e40a7a38f3d7/case_580b_backhoe_service_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea273c0-f23e-496c-b011-2f80621cef0a/61029919189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8b1e47-f3ed-4a90-8555-a69a9b311974/list_of_predatory_journals_mdpi.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 5232 bytes
SHA-256: b0027bd3b108309ddb6e44a16077cede9095261d3728b3c8efce050ea7fc957f
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 10768 bytes
SHA-256: a989c602acf80cad0c923225bbf07c412987114ac602fd5d6037cd285a6db9c8