Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1926700b95f7fe8…

MALICIOUS

PDF

100.5 KB Created: 2021-09-06 15:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 53b1d890e00790e12f6d8a8002bfa3bc SHA-1: 6790921c9355899de002be47d5b823ce28ac3980 SHA-256: d1926700b95f7fe8dbc1cc23b3058f7d894565852884fe5e96b37e1055dcf8d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/cf5aa31a2df21eb176a37ed2ed2a08d3/90051479790.pdf In PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/valebugavuz.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee09e5dfa5---46518640344.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d6c2e6a90---dusizesixibanalomezavu.pdfIn PDF document text
    • https://mattress-leader.com/media/3370413657.pdfIn PDF document text
    • https://irantruck.ir/data/file/71939688068.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/pibevinazefoguvewuz.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/am36afaoi3mm6u8t821g7a6bj1/65197342855.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/61542859491.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/f14ab541601b54fe43c08ce2ba9209a0/80542704147.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/hfd02ik4lujm0g476bmduhfhq0/kawesokefiden.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/6tqghlqsssd0dqk8bmhn5f371m/60597732260.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160f56b92351c1---dasavekaviwodisen.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/35584003042.pdfIn PDF document text
    • http://accronline.com/userfiles/file/29276882340.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/19c8fa1058d85d3f4c7aab1ae640ed7e/pibaxopetibex.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/wukezev.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/fafufegexikigowod.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f32918e3909---javixaru.pdfIn PDF document text
    • http://word.mn/uploads/assets/raroliwiwudosu.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/51496830021.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210729_075729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=geometric+algebra+computing+pdfPDF 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_off00012018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12018 11072 bytes
SHA-256: 73b166fe1f3b455b1e78a18b5fc95d54b4ae4723ed153daa49bf1a606e7ba736
font_01_sfnt_off00013972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13972 19284 bytes
SHA-256: 7cd1ecadda431becb57bea3feaa2afbad01a6bc7a392d8a1c577bcd45a76a7e3
font_02_sfnt_off00016bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.