Malicious PDF — malware analysis report

Static analysis result for SHA-256 248ebc15b5feef35…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 04:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9e58450b39c37b71cd0b8ddea0b6382b SHA-1: 58ad7838451288f3258df3233d648bb20b932de9 SHA-256: 248ebc15b5feef353c415ec0811912a2863cc5242f0d0d212ec9f814da8e653c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://shidoremicrosys.com/media/18313596633.pdf In PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133ce760daff---40511976577.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/durumapuwo.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/58821889425.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/71799089703.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/novinibukazixo.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/81822329084.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/55643270035.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ecff1f40d6445a144705e4ddbc604476/ximitisajesinefunamep.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b0b126ed83a5c3555c7730e87fb4b752/defir.pdfIn PDF document text
    • http://snft.ro/media/file/toderirubujomemewegaboda.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/88733848366.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/kizemelasamaforajesip.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/75959377318.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614534f400733---vuzuve.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/fufavezotojagafod.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/jolizelevimiroziwod.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9c117eff8---45496397007.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/lizebezopumenezumijedipo.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/nidawelizejejumuzujonubo.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614526436ea45---26387185107.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/11511731178.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/14266256164.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/rukulemak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mini+militia+multiplayer+hackPDF 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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 10648 bytes
SHA-256: 8bd0fd085a0434a1271ae935ab78cac2f41177e03c811370c76f35ac309c3b3d
font_01_sfnt_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 17972 bytes
SHA-256: 4fc950328f37f1f125882203b6cacd20289355bfdbeb35d03208d7d5394eeb49
font_02_sfnt_off00012a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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