Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25529db01684443…

MALICIOUS

PDF

102.8 KB Created: 2021-02-16 23:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e88a9ba60d40eb1120ac06cee8f5d970 SHA-1: 82c35ee65d5776562d75672c7131d0d379566cd7 SHA-256: e25529db01684443379d2887f37e60ae58a56b8b41513e7626697824a411ea6c
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically targeting 'instagramcopyrights-verify.com', suggesting a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous disposable domains and link farm heuristics points to a campaign designed to redirect users to malicious sites for credential harvesting or malware distribution.

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://jottigo.ru/123?utm_term=who+is+lucifer%2527s+first+love+in+the+show PDF link annotation
    • http://help-lnstagramcopyrights-verify.com/11877297679mw6og.pdfIn PDF document text
    • http://newyearshop.site/fefobanebepadapefie4fmq.pdfIn PDF document text
    • http://20970907.net/nidefatanitetewoseporoponzl63x.pdfIn PDF document text
    • http://kihepc.xyz/planos_para_fabricar_muebles_de_maderau177j.pdfIn PDF document text
    • http://mini-cam-v2.club/linking_multiple_worksheets_in_excel7oqdd.pdfIn PDF document text
    • http://fapenas.22web.org/93858738402.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/WtSjiV9/lifopagenujimasugafon.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/iahfjhV/fevifovata.pdfIn PDF document text
    • http://onatural.space/music_theory_quiz4f6di.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/2d730b8501628.pdfIn PDF document text
    • https://lewefuno.weebly.com/uploads/1/3/4/0/134041273/1961549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefepar.rf.gd/33493163212.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/thenar_eminence_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/petty_cash_book_software_free.pdfIn PDF document text
    • http://wubexemetaxoru.epizy.com/kojisefuvepej.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/5975390292.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/wefek.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_off000156ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EF 4956 bytes
SHA-256: 8c55a3beda60cc37d56d4dd503b80e58607a4cfa397bb86e63747d7d6fe9680f
font_01_sfnt_off000167ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167ED 11380 bytes
SHA-256: 25f7a831ad5c502d5e700039123dafdae1c523279e52627316bd2bc610787365

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