Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed82c0bf1b3861d…

MALICIOUS

PDF

79.3 KB Created: 2021-07-03 03:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5fd1497ea1de3f8a96cc9603a3ab0ca SHA-1: 49904bcdc3a79289d748883ccc320a1c178c22ed SHA-256: 9ed82c0bf1b3861d7ab7c4585e2baf5655cd45ec29c317f680e1b666ceef80f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous URLs associated with compromised CMS uploads and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://phonphangschool.com/upload/files/sedezupa.pdf
    • http://kadh.kr/bobod/upload/file/26645730054.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd4166eb44---rederuxunatikerutumivulex.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6e9d5f59dd222a0211a5763ad318ae60/xokuwuxudalax.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16095750dbb27a---sudapatep.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ree9gvv9v5jojdkjn1ga6gq09h/zozenemewaxukamanokut.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4de201cbd---51648853583.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c28e4d49a58---detaforasetojamobeberin.pdf
    • https://acrgroup.nl/userfiles/file/63171241328.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a2q53l5hrqjtjb088hihldjin4/nukedazakonaliri.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/bo0h6pdltmeqil53oqmr34s9b1/lifexog.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd3331b014---1245679720.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096ba9591e6d---pajatupiwoze.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aafee47472c---tapasitununeranem.pdf
    • https://menu2uplus.com/images/file/76843317219.pdf
    • http://bostonmentors.com/userfiles/file/85165008018.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/47676677226.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b411295031d---ziwopivedokaleja.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f173d11a---17353420565.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df5117d0a03---gasegigigoromuparapibiju.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/3e7cfe81416732d4d544f1a688dc31de/jodajifezolitefi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+build+a+castle
    • 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_off0000d3d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 16792 bytes
font_01_sfnt_off0000ebef.bin
ae7e582edc50be90ff253b0dea2f0e16dfb60035f5bf5a8a9a35c5c71be97cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 10476 bytes
font_02_sfnt_off000103e4.bin
becfca7ce6e4c265c91a05e12572ba29c6e57920b89175464e65d8a6c700188b
pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 17548 bytes