Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e137133be814753…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 02:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb2fde5297811bc1c00f7c49deb4565a SHA-1: 8d86ca0179617713ac07a6322e5f7d3f0747a8b1 SHA-256: 0e137133be814753f5aa962182d63adac797db6fdab27d84e0f5ce1dd685fa70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites. Several of these URLs lead to compromised WordPress upload storage, suggesting an attempt to lure users to potentially malicious content or phishing sites. The file's structure and the nature of the URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/6gkncap5durki8mhf3bks0ade5/80687233091.pdf
    • https://iamtimeshare.com/userfiles/file/sadim.pdf
    • http://bookblog.kr/data/file//files/lisufon.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jhpckin11l12tpibdiqdimubt7/71989983056.pdf
    • https://echipamente-scule.ro/userfiles/file/99505265691.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/28059943879.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6a41d4dac---kejil.pdf
    • http://qiuyutv.com/userfiles/files/20210528055243.pdf
    • https://drvishweshwari.in/userfiles/file/29603722141.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607387b4ca471---wejuxuwuje.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e13834bcba---radebusamunu.pdf
    • https://alamansyria.com/userfiles/file/62575334276.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609422d0b5743---10089753713.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f5fa6d9ebc1fdc261c4fcbcab67bba97/zasowedilikijepelopamuful.pdf
    • http://thsport.dk/ckfinder/userfiles/files/nedipumexopekizef.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1279dfac1.pdf
    • http://thetsaban3watnuea.com/UserFiles/file/85630216347.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a04843d25ac---zenaja.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ed325dfed83ade0684c371e67b383c7b/merewibilazoxasaxojem.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609824c26cdcf---vesufirusezumaxunupafob.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f4c1d28fe---57023612463.pdf
    • http://eshop-kocicinadeje.cz/files/file/76668298961.pdf
    • http://bafiti.com/sklep/userfiles/file/buzidedusokupemanal.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=flax+seeds+and+kidney+stones
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e978.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 16792 bytes
font_01_sfnt_off0001018f.bin
ab193f8a1058788771c4dabb36304eb2e76237036386782eb535d829fffd36a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 10424 bytes
font_02_sfnt_off0001194f.bin
de2ad14ed42df2be0a94f9da3f834da2c37a5c04c7fd8cbc5aace06293860671
pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 17912 bytes