Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd307d94742fe60…

MALICIOUS

PDF

73.8 KB Created: 2021-08-08 10:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9bb348c2add24dbca7dd1608fc15942c SHA-1: 8833e5c188679c9093eec414459dbf8ac74b5e41 SHA-256: 1bd307d94742fe602b3249a51ad9dc27511f019ebf6727e72f402f3dab8c6892
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URI heuristics further supports the attack pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fqf48pk0mh4him6f7rr3t5gnr9/mabawa.pdf In PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/sexujebedunolokelir.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/76332001953.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7b8ddac87---97541348764.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/79ee773e28406b777b5248484bc722f7/nanukupegiriniwido.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/5604925452.pdfIn PDF document text
    • https://e-room.co/userfiles/file/rabuwufaxotagapujugovevo.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/92064010560.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16090e006a59db---69198676123.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/sfkg5pe0dtv37eu32bn646lfg0/94398731104.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160846c1ba3535---22172042336.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/053a133cd2d859b2a5636df988da9d18/35688611166.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52afa06991---xusawigefudejijirobipo.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/586e1be4963c883b3b3e531b3f2d7abf/kagesabujebidurow.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/57485228279.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/11671438815.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f333745731c---vupatopozez.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/77423189721.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b9826df0e7a---24501241891.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5225d672d8---66790153958.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/suxajoxijejevojutuzetup.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ba7e21716e8d69d8fa8f86db36ff36b3/69577185362.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/67188305644.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/vobaxumafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=balancing+equations+worksheet+ii+answer+keyPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/dbb364eea92429c98c5c78c357705d43/kevobekisesa.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_off0000c0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CE 15088 bytes
SHA-256: a59d27f3877c84d3adf00fc53bc45656367f9fec25adad36d3d516fdd2c1c52f
font_02_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 11100 bytes
SHA-256: 48583286af8f7a073ff1c3caa5d3a82e0c14d85849530bab2fb826ed8e4270d9