Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce016db2502a2be9…

MALICIOUS

PDF

81.0 KB Created: 2021-09-04 18:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6c92bb00409d99a6940682617f8dea2e SHA-1: bbaa62579478c37efefd7c9b6f3fc748f52d9b46 SHA-256: ce016db2502a2be93881d40c42e399b76367a1e8f87731b9f2af138311de716e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=sudoku+puzzles+pdf+easy PDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8957f19e42---89701313969.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/59510855624.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/modabodimujim.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/zodif.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/gosar.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/28338832454.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/1luvks3v44148b0n5q0341u4f4/7394215063.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/446b17613f8ded77f3c2f9ee449480d5/jaligalegonivu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b205fe699c4---88732889454.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/3up76slec61n22q5nf6f9rc1ci/dodapiwujupokugovokar.pdfIn PDF document text
    • http://cutskytools.com/d/files/wajojatovotovofup.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/vagevuremebebaxera.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a9dd68b0e---89887358092.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608c742e7793b---95748145677.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/40185652380.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/29123116339.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/155ed6e8d0879e8f80ed07bea09542c4/44626795154.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/d6e4f35d3e590edd1da6ea4b6b66f248/30407642113.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1610f72d62d11c---bavet.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/a9fcce9dbfd638a4eb31dde266f2ea10/17279103387.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/juxunenelozisik.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/lakekizavisodakumutivalo.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/29049301245.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_off0000da5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5D 10536 bytes
SHA-256: c6aef4e44ea3e5aafce7c1c21dc6b784b09f57d8d8884c7f2552451e75e15071
font_01_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 17220 bytes
SHA-256: e2b87436cfd47af5ed43bb06fccbc9f58c7b3871f4d76cadcec548c1805d0eb3
font_02_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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