Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff482fc85e05de4…

MALICIOUS

PDF

119.2 KB Created: 2021-09-16 12:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d7750d4cd23f2df7733263b65e7ff77e SHA-1: ed6d7dd9164c3048b4f376a80227c68a79ab39cd SHA-256: 2ff482fc85e05de46f8654ca201bbc1c97074f037f4bc3385acff4c8b6ffe747
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://canadapremiumlubes.com/survey/userfiles/files/5792744345.pdf In PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/161302e3b15edf---31940506941.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/fusanukemazixiliporogaxu.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/bomabovopewu.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/komipanotogapejefef.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/23426314057.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/wexedodatesozetode.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/xudinufunupisazirerebukiz.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/dixebolojiburufowufeseju.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/ruladopujezoju.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090516450173499.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/2385186514.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/44401837576.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/zafusapoduvolonivamino.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130cb930e7e0---70216939626.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/kuwelagive.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/dapag.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/51335885913.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/39792305903.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/limugubupolijek.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/88004173346.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210904162026.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/91289805114.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/bumefi.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/budadenuvinawefetipur.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/4303262232.pdfIn PDF document text
    • http://insightonafrica.in/userfiles/file/91824328219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+ring+of+the+dove+english+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_off00016e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E2A 10644 bytes
SHA-256: c816f760892c08fca1d40dab3b3929460565b4c82463e359204338f251d44a24
font_01_sfnt_off00018643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18643 19032 bytes
SHA-256: 0a2385e5c96584e3db9c54f2dec9731ffcf8714d14a0869c0cd66dc7e54a6bbe
font_02_sfnt_off0001b66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B66C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1