Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec0d0d0fa54ab3a…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 05:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ac6a2b5f6893aa633b95783c2c4173e9 SHA-1: a92925b8b3f62c5ea729a8be802065265326a3d2 SHA-256: cec0d0d0fa54ab3afff2254520cdc98aece0f65238e6bc8aa2ef6442da07fe62
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and exhibits characteristics of a link farm. The presence of external URIs and the overall structure suggest it is designed to redirect users to potentially harmful websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pistant.ru/uplcv?utm_term=android+development+meaning PDF link annotation
    • http://pitchdecor-construction.com/user_img/files/56314030067.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///bagowifurixudefisikeba.pdfIn PDF document text
    • http://ativn.com/upload/file/warobi.pdfIn PDF document text
    • http://scpt.it/userfiles/files/tanexen.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/negumivovarum.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/sifazaten.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/47742932026.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/80420477585.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1632314995.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/63641336681.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/49192695285.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/fagetuf.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfacd7165d---28134326227.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/35629201845.pdfIn PDF document text
    • http://mamitobe.ru/files/file/61145493458.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/bijujonotigobetelejof.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/99074924850.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/legulaxop.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/bikupobob.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/panubufunifipafi.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e04d96418a29334289595a9ca87b60db/18571006219.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/21430683846.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_off0000acd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD5 16200 bytes
SHA-256: 0a43cb378b9e64f7f87bffc27dbf5bbcd6afd8c3b14ff4c5143dd6152d6dfba0
font_01_sfnt_off0000d622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 10616 bytes
SHA-256: eb6d627b73fddf64f607f5698fcfcca2622226f4ac41dd2a7f5f23c0b8f7cadf

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