Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1362c789d22f03e…

MALICIOUS

PDF

71.7 KB Created: 2021-06-07 12:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a43c64d4fcd0a408937835e0cae899f SHA-1: 8e821209d23be8e60b6c87dd015e8cbfa947c876 SHA-256: d1362c789d22f03e4d485edb784d48de0f41d67d1b6adc1051ee28565eb42509
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to redirect users to malicious sites. The presence of external URIs and link farm characteristics strongly suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=razer+edge+tablet+for+sale
    • http://absolutelyneon.com/userfiles/file/81980397571.pdf
    • http://www.contectrade.hu/fckfiles/file/45482793841.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607291e1c1615---welunesebemipuzuxat.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba76ca46301---jukovimetajuxajizedud.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/0ddce085de2c1ae1705392ab64b255fc/31689440211.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eb14e472---73860423107.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/740cc6863056b15761d2f863af4b6719/raxogefumuw.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4fce7df1e---67039599268.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/cbeb7f82bb560d1dd666e3c3a4b662ea/28883888835.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b608bc72e6e---19893256127.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c28784e35a---70942475628.pdf
    • https://auto-rujo.com/images-editor/file/nifazujadodogiso.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5296be77---79944541568.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d0bf29b0---povujobi.pdf
    • https://abugfreemind.com/userfiles/file/14244857875.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5p8jv0e0lqoiul5j8eebooaih5/gimuzisuwodinasesodubiji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2d.bin
f5b98c4706ba7e708c1368e2569b2940b382ff839863d1d39fd39d5052b70840		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5272 bytes
font_01_sfnt_off0000ee38.bin
8e1fb1a4860227bc27662f78bcfd37b9b754c73ec14ca58b2888f575e1b1c5f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10452 bytes

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