Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbe0083099ea8d6…

MALICIOUS

PDF

83.4 KB Created: 2021-08-07 11:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3d3831309927634be0c8e86ab81a1d2 SHA-1: 1f58d74a8221d018cf43762cac594a17a0935d61 SHA-256: 9dbe0083099ea8d68404c72ae83fe50483d85b1ffcbfaff6c3e0a8ce49fa4fee
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pixomot.ru/uplcv?utm_term=46re+transmission+rebuild+manual+download+free PDF link annotation
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/56e5d49c8d03308b2a916694539ab5e1/88760335115.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e41e934c4bb---65637549248.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072caf1095d6---bekasusozobogezosuwuzaro.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/zojiberobizonerujunizol.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/lakedefozub.pdfIn PDF document text
    • http://geose.ru/userfiles/file/vuxofomonifijunasiwanut.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/88568879193.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/7823a91fdc952df7e0f9309afa2e9bc3/3056369829.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/84210339939.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0d61dde7f---61795331218.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-07-22/images/files/35806757088.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7e03d455---xejagexuga.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608632c27603c---99068256069.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/71316404160.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/pupakekudulinotarufodavi.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/12211014363.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/347aa3a781fac0371907c24f24dc001b/gavutajuruwukurojirenakul.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/4469544caf1cb81d9b2a55abb1971b8b/72510836995.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/dubakawusikiberivuledidez.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_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 16196 bytes
SHA-256: 3dee40afd05d88a33c8ec62a0027f116020e14bf8f48d79d7c77fe9ab67cec95
font_01_sfnt_off00010b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 10988 bytes
SHA-256: 2c9916454ce6399fd0e737e85b49dc77952aa950162eadf69849ab8557cd0a80