Malicious PDF — malware analysis report

Static analysis result for SHA-256 529888ab5e8d9994…

MALICIOUS

PDF

91.4 KB Created: 2021-08-07 16:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3d10c2eb6f97d18d22a4c5ba54680a94 SHA-1: a3ee5b33a61f88a9894d7e9a3803d9df4d70ec53 SHA-256: 529888ab5e8d9994cf29fd320c1af3d94cead417c2323630324c82d2003928a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded links, with heuristics indicating a link farm pointing to compromised CMS uploads and disposable hosting. This strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://parc-hotel.info/file/51967894701.pdf In PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d50fa5e235---7252717740.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ef5651fd806f044c9de56837c125617d/kijubivexukezari.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/39340305905.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853a43143e1---fabedikubudadotar.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778e2e86a45---65745514688.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/6063183449.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-14/20210714085242440020.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/9c3872f0eae1ca071bf48729de9168d5/bimigev.pdfIn PDF document text
    • http://ellev.fr/upload/files/54580492420.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/navilejezogapoziwazaduji.pdfIn PDF document text
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/motufifegelesax.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/84871199038.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0a7e418ea58913de9a29bbf0d966937a/18865075080.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/0ab31c93419a24d407e87ea084b761da/16617335639.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5tbmuepu9rk1u09oj5jmgmeal3/93193811754.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f20cddf2---27472892488.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/gezejapijomolak.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/fc4gddeiltiakim20un57avr30/zatigizevomilemikugo.pdfIn PDF document text
    • http://abpaluso.com/upload/file/56999346357.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16103da447543f---40586750234.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/pepununig.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ec47e188dad449ddd87944d752a63a61/39081973273.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/lujazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=go+transcript+test+answers+june+2020PDF 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_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 16868 bytes
SHA-256: 7758e653418ff9239aa70455c00bb38c866ba9176b56f68c7e233a0bdb69c510
font_01_sfnt_off00012cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C2 10920 bytes
SHA-256: cf402bd59a09c26d0ab4ac3c6ee81140f444ee1683f2cba36526ab5a123e04d4

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