Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e009f2d28a96a00…

MALICIOUS

PDF

83.9 KB Created: 2021-07-12 23:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77082f9694b1eba553165da15b9c02da SHA-1: 3a44fb6aee08fdf8edb7e9d870dabeb5e7108d32 SHA-256: 3e009f2d28a96a00302ef58a22d1aae822c508b5830f7fb0ff7b9ec27db747ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are hosted on WordPress installations and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://jerseyshorepirates.com/userfiles/files/nametom.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7107018792ccc6a202784ca97c0489a7/1231371351.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d00ab77dfba---japomagibob.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/acd3c0011ad663429ca176f6e211b026/xovejezumemobenorowime.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d990c5722f---rekuzav.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf9e764ed2---28321639955.pdf
    • https://srilangkapools.com/contents//files/livolujozibubirajuxabesi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ec5a44dab---83155155637.pdf
    • https://alamansyria.com/userfiles/file/19578114475.pdf
    • http://lammensfilip.be/uploads/files/64091867192.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c0525fa07---30995794532.pdf
    • https://cbdc.co/uploads/ckfinder/userfiles/files/vusibuberupetanavilu.pdf
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/ziwovukizize.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5b83ea21c---43924737170.pdf
    • http://amphorabeautyclub.com/campannas/file/medokoluzepojowufurese.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ecd03670---ligid.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bbbe8b38---masatodesipokiperawaso.pdf
    • https://realschoolspirit.net/scauserfiles/files/13797277548.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/6c9d05d861b48aa44b294ae722fe2827/kokegusesuvipi.pdf
    • https://jxloanchien.com/style/postimage/file/jezofekujedovor.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f9e95856d3a3d63e854cffbc8ff2f50/vibejatus.pdf
    • http://amexeuro.com/an3_Uploads/file/3504161507.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608355ca49253---14549784795.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073eed3e23e2---5558032013.pdf
    • http://santeh.md/img/files/zevotizibafexalaguzefudo.pdf
    • https://abofahed.com/userfiles/file/64036077039.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f38b61438---55724825991.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9837a63f---fijamivij.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=english+prepositions+explained+pdf
    • 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_off0000e54e.bin
7107efc553da00dc54d15535f571f5b37fb0c0c689b974acd81410e929219e23
pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 10864 bytes
font_01_sfnt_off0000fe15.bin
263a5cfdd848ac941869756921311496979da21d0c19d660082a998d5e5c935e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE15 16752 bytes
font_02_sfnt_off0001298e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1298E 16792 bytes