Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c503291ee24188…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 02:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b3fee91078333279d4f5a6898890f41 SHA-1: 4ffae0e119a52b5d792ed0bda5fe009bb9b4185a SHA-256: 95c503291ee2418842c0208a34eb573ab0f3827aa5af47ce2e4527bd81fe1955
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lead users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.asoriofrio.org/ckfinder/userfiles/files/xuvotirevodidojafogowed.pdf
    • https://aokman-drive.com/d/files/6923020287.pdf
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/ragofose.pdf
    • http://chipgene.com/image/files/20210907_103338.pdf
    • https://samsungdvmklima.com/upload/ckfinder/files/lejuxo.pdf
    • http://roomyab.ir/basefile/roomyabir/files/pepewujirubu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7b5c5804256fad42c8d5bf6f83e595d2/nenojapagaserojuz.pdf
    • http://ccspatti.org/userfiles/file/pazebowotikuzulivikodotan.pdf
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/fafejuferanu.pdf
    • http://union.travel/ckfinder/userfiles/files/83607166770.pdf
    • http://www.jindatunnel.com/up_files/file/fojabejewutaxazidi.pdf
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/nebuwedogivajavasumexoxo.pdf
    • http://thedewakohchang.com/image/upload/File/0162786998.pdf
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/rejizirufuweva.pdf
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/kubupojajivamisogafotebo.pdf
    • http://vasvaripalmuzeum.hu/upload/file/18712971698.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaf2a52669---dapolaxawaka.pdf
    • https://thibiditrading.com/public/userupload/files/vedubukivuvodopipoxovuta.pdf
    • http://fetogram.ir/images/upload/files/xikobonuwiximogudusaduv.pdf
    • http://twgo8.com/uploads/base/files/202109110444534406.pdf
    • http://jlm-kg.com/uploads/file/39936288318.pdf
    • http://jiin-torng.com/uploadfiles/20210902165639.pdf
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/05092211698.pdf
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/niwalitilefefegasapufozut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=notification+apps+for+android+phones
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db7c.bin
f2ce4c49ccfd7b9d34f3a70c53425f37b44988105eb89bb4aacfde0d78e4a53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 10648 bytes
font_01_sfnt_off0000f3d1.bin
bfb3b54b2a089cce87422e031da1806d01c4ff61c1e7530cb3cf1feec9a4d439		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D1 19008 bytes
font_02_sfnt_off000124fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124FB 16792 bytes

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