Malicious PDF — malware analysis report

Static analysis result for SHA-256 8280dd2543e49e05…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 17:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cce542c879270bbf26a499ab5ba7a9e7 SHA-1: 4e0a04cd6651bf4cb98889745926284b51bd49ad SHA-256: 8280dd2543e49e056ad712f14805ce1a89858f68af52e66597cd19a037931fe3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The primary function appears to be redirecting users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5efe663a03---pasutowevenavemodukusol.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2bad0ad37821efc48edd59037fe49d40/99880933074.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/34584737e4920578b437c4d513bacdf9/milusotegotupu.pdf
    • http://ascensionchina.com/userfiles/file/jirudaxiropizukev.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/25121d2768c9c2240cb048e16ec7eb77/71761665635.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/hjpgclp9ibehia1g8uts9cijn1/lukijudogakiwexo.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/51b23bbeda23243d9c9719742833a100/59859422870.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71c3795eed---39671738369.pdf
    • https://unicornccc.com/ckfinder/userfiles/files/janirewowedij.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/8jift853hg4tk89eq25ormkpro/99843210782.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae96abe0b5---pagijemamifugevararazagim.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609244817f73f---sovujuzuzesipozoniz.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/64303784e8c44144d29edf1649292559/8259695343.pdf
    • http://ottotech.center/userfiles/file/94775979703.pdf
    • http://arch-teh.com/pic/userfile/89961269968.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ghsldh15dhkdt22vl23nl94gdc/voxominubovo.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c7a3b26ac---86550901253.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9c4e8c0a---15887719295.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/c5gu4k42p0qlgn23dlb09ttdu0/wedowokibapenolizoxavos.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/69d950857855287358ab18c699e70e24/94248165115.pdf
    • http://udmvdpo.ru/images/files/fofiluwomixub.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a83f64642c7---xosox.pdf
    • http://ersatzmonitor.de/userfiles/file/nolaxivemodavumudejitasu.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/79fd275a88eca2f6350c838728eb18f0/sirajegotofukekugodikij.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=where+is+862+area+code+located
    • 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_off0000e918.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 16792 bytes
font_01_sfnt_off0001012f.bin
2d51c2a652525fb492fa0c774987cf37bb65a1932554b7960b18be0d046c123e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 10852 bytes
font_02_sfnt_off00011a7b.bin
f1e82bd5685a10db826aab5b0c0e9eda89efbf5c8b0a1e59aa2f450d82859b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 17696 bytes

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