Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce330df8e3259f3a…

MALICIOUS

PDF

84.9 KB Created: 2021-08-23 11:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a30e99f96d004660552c0265534424e5 SHA-1: 5afd93b9d547991b54771a9539ab7f0fef3f1bb6 SHA-256: ce330df8e3259f3a0138f700d07002e5a6dc274352eb04063732417da12ae9aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to compromised WordPress upload directories. These links are likely intended to lead the user to download further malicious content or visit phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5ab0ef2bb---2361603837.pdf In PDF document text
    • https://boyanbolyarski.com/userfiles/file/xesapitedipazibokifanazaj.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/96200916731.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/18157807469.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a43122c5f74---80190720944.pdfIn PDF document text
    • http://minerva-collection.net/files/files/28708923714.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/tudanasufafaxava.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/xazovamilimibufolibudiw.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e396e1eaf---gijixi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f4072d6a4---dotijedokexudidij.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/36899d4dd47dd926f27fbe356930eeb3/78780422925.pdfIn PDF document text
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/vovuzawazorobegiraniloge.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f85d5f1988a---30955811406.pdfIn PDF document text
    • http://honghuibio.com/d/files/97414346007.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fe00bb09e8b---tivikija.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/cf3d655b1cb1f17d9a8372a5d6d72bfd/25445295159.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/24f5e0cc19fc7129695507528f900282/lenamimoxitujoja.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/42668059963.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/5522167252.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a8f21d1ce---90060823983.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/58fb4e06dc1ca279d8c2af0fa42e3a84/welejidotovinubuwunut.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/nelewubewilezu.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/desaneruvujupodigag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=date+me+applicationPDF 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_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 16892 bytes
SHA-256: 115784f2b57c59fd224251eb6456ea8782d16ee0858e85f8d594a7bff7695fa1
font_01_sfnt_off00011637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 10268 bytes
SHA-256: 817a9c2a3caae4eed2112a949b8989b4bb8c1d4ca6a427b58bdb431555011dee

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