Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b323f1b2213b58…

MALICIOUS

PDF

86.2 KB Created: 2021-09-20 13:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f71377f979147424e7b31c258137f2e7 SHA-1: 76d6bf487cc2a8d0855b2806d4bcf9ab49ebafe5 SHA-256: e2b323f1b2213b58701e502bd37514f5f0f99776049295cd3ac865d9acc6a319
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains numerous embedded URLs, forming a link farm, with one prominent URL pointing to a potential exploit or phishing page. The presence of a 'download' button heuristic further suggests a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=fast+and+furious+9+hd+123movies PDF link annotation
    • http://waterlootour.com/FileData/ckfinder/files/20210916_CDC9DC4D82E91643.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/sutetiwalofixenidesobelu.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/11172765289.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/78542290306.pdfIn PDF document text
    • http://vititanon.com/user_img/files/sebamewadawatudubederedaf.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0d3374688---fitudaruluv.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16142565fea747---kotudemipukiw.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/wofazidanovuvawutefun.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/gugutijuvotinuxekol.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/tizelos.pdfIn PDF document text
    • http://olympusflights.com/files/files/lafevidiketunuwoj.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/55838678758.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kowugewinusazoz.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/56653283281.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/100555535522.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/22254357974.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/2589467701.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/94523566068.pdfIn PDF document text
    • https://istanajp.com/contents/files/jironakumezokin.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/genufekezosa.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/penexagolirijetabuli.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/febuguzejujinomofovodiz.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/11288738636.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/22555206427.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/27862903343.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_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 19148 bytes
SHA-256: 24a8e54fd8dfded685ded7bbb255c509b4ad4bf199e52927636a4456e74f4941
font_01_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13167 11228 bytes
SHA-256: 4e407af55c2b5b45b7c0d6b15436db2edb8292edd7c5f6db06cb1d6999af9ac8