Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf33b37d1cad6c9…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 01:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9acad86171c9c4225f7221e532afdb17 SHA-1: ee1dbc7c295e1394ae0cfbd088672c7a4231e797 SHA-256: cdf33b37d1cad6c98fd261a8412bcec730ca3c8a4ddeaa5b3f7d8e6437276d37
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://suphammamnon.org/uploads/files/penonazatub.pdf In PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/36690843606.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/91841567336.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/kevosuxupe.pdfIn PDF document text
    • https://derfo.info/resimler/files/88846989916.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/poziv.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/3876035590.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/ruropizevijuz.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/34223900103.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/favetoregozawizalodu.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/fudogurumi.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/71448101340.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/mukokitigukododilubo.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/95561407463.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/53851765616.pdfIn PDF document text
    • https://conrays.ru/f/data/62892868535.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148926738164---pakapo.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109260029501815.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/62801040291.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/2797917514.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/69040855868.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/tulejilufalu.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/1603239025.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/29436321789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+porn+app+storePDF 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_off0000ad3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3D 10320 bytes
SHA-256: cc41f082cca51b657fd553cb8275bd298189ce496006cf6ce4a3738351eb8d1c
font_01_sfnt_off0000c4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 14980 bytes
SHA-256: 81d96213ed758572d0f476dc12c3319677f05249953f06eabd1fbbde0a738995

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