Malicious PDF — malware analysis report

Static analysis result for SHA-256 1216dfabbda1f6bc…

MALICIOUS

PDF

86.5 KB Created: 2021-09-09 15:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: fa599ea0e14ceff35a32e67d01d48666 SHA-1: a374db5535c20197ee508ecfc67446c610a2cb91 SHA-256: 1216dfabbda1f6bc38fcc9469e3a2c17c3e097be423ff4990dd0392bf34e4606
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=green+cloud+gaming+apk PDF link annotation
    • http://aristosaigonhotel.com/uploads/files/xesudebeki.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/87872169950.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/dolexeribos.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/57046119599.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/144546859361361dbb0272d.pdfIn PDF document text
    • https://tekmaker.com/upload/files/zexegawenosejidixut.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/81008621938.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/81268677199.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-3/20210903070138309819.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/95839345015.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/weganaromakutupogutare.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109041757345696.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/tekiwabuneg.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/xokeluzatilefiwakit.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/mibizojowokajunevogoram.pdfIn PDF document text
    • http://tion.hu/upload/file/xebikumujaxuzad.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/34771125309.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/vutoxupagoweda.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210904_222112.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/vixezalufakopomeviw.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/vurogilewifil.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/79770233527.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/25578072140.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_off0000e38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 21972 bytes
SHA-256: 885df0005d5d7a214e26397cd2e9324bb6ab9169c1f1f8570e6d2aa8abc1123f
font_02_sfnt_off000133bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BB 10820 bytes
SHA-256: d6982aa5dd6e7597dfcf16b69f70d6a6a8878cab503adf63bc9da947d2391414

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