Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eae833725a44f2e…

MALICIOUS

PDF

69.4 KB Created: 2021-10-04 08:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2a42a51ac62b92e23c3f14ee83017959 SHA-1: 777459794d4472b3d6cd5e01316dd6c9d06f2d3b SHA-256: 0eae833725a44f2edfe97bd0f767fb4ef13c4c844a08096f50d98c599d7337d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/59525638212.pdf In PDF document text
    • http://tysons-cafe.com/uploads/files/88934599198.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/80584956958.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/difusaxazu.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/bubumamope.pdfIn PDF document text
    • http://www.rarlaw.net/siteuploads/editorimg/file/12600673981.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/ronokubeweletulaxazesiwi.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/zopivililexajumasebobi.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/53738221387.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bee4a0f14---bifab.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/xepulofisut.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/5499680148.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/53003442573.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/kirutatoneluvuzori.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/pofefazuweteniwo.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/xurip.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/88752011862.pdfIn PDF document text
    • https://dcimx.com/files/liguk.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/3514690819.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/33154128513.pdfIn PDF document text
    • https://mfdesign.hu/files/file/39372212340.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/84163185187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=blue+color+code+in+cssPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF80 16276 bytes
SHA-256: b9f44d36edf897ba3b0689319ff3c823c7f30d05da57095cdf9b8bb90415a8da
font_01_sfnt_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 10256 bytes
SHA-256: 7bbbc6cf1684c6f952664efe0df24b0a4acc13492357a4c51946a76b37270f54

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