Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa847e8e48195bd…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 11:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: caad46750b1917111ae382b1893e9143 SHA-1: ab8832ea9c886ae690ff3003497ffd83e1cf4e00 SHA-256: caa847e8e48195bd37081cee6420fe6ce53091568e435fb5e542dbc7b2fa1348
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tipkeo.com/js/ckfinder/userfiles/files/94003820410.pdf In PDF document text
    • https://siroyensao.com/upload/files/51470115825.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/pupegodil.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/86964818338.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/lixug.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/vodovunerodolud.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/nonuvagaka.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/68556366375.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/24990967352.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/75003659905.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/zuxevewebo.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/kitevobowevoze.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/002aa182dbc3eb4a149c473fb5be48c7/netegelunejazuvaraba.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/rupusi.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/72750593968.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/79228705839.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/sumotepuzazetemosevu.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/buvaluj.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/67350162021.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/zezopo.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/tozokaredulose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=which+is+the+best+gfx+toolPDF 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_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 17788 bytes
SHA-256: 76f20f9e9eabcde23d1c8169b1e96aa7b733c6f9ac5cdd9144578d7ab444acd8
font_02_sfnt_off00011d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 10484 bytes
SHA-256: 863cd3803d233511da760dddcbb9678442a14401cb6d1d902f91556ddaa78679

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