Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ccd63490c3f69a…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 22:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 569517e69db049c80750daae122883fd SHA-1: 7c4f005b00e550c5fe965b85971884902870b32a SHA-256: d6ccd63490c3f69a1144e41869a0632e0ff66fedc5c30f890efd334cd67f6008
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://philabc.ru/uplcv?utm_term=utorrent+free+apk PDF link annotation
    • https://jahanchart.ir/data/files/file/rijivumogerepuzinu.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/fasikomonimosasugirit.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/kevapewexaj.pdfIn PDF document text
    • http://bdnchem.com/upload/files/legunowimexiludom.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16143a6a16e895---tazowavutewakakuz.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/mitejedamawugarisow.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/xuruvulowalat.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/16636872933.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/91570214831.pdfIn PDF document text
    • http://zxsolar.com/d/files/tepusiravijalexora.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/29303005512.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109011105159765.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/49497463775.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/1f662629e56406a3dcd3fab4fdbe04de/85665463309.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/doruwazoladebazowapoki.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109041255485645.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/xumukasemajejipufoperiva.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/87349472526.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/14310111575.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/71422392193.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/68859660727.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://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_off0000af90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF90 14748 bytes
SHA-256: fb90b1e5b70d0e6f3210ed9bacf3f33c4664901c79a5351d300540432cbf1f1a
font_01_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 10144 bytes
SHA-256: db109d0ad00b878481cf5e615e498aa8b71736a5f43198657c056b0b080d68cd

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