Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c8d477a1bfe19f…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 00:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6f0f0c42b5ef3282107a6cb806e3e16 SHA-1: 7b2416f93ad0882016d2238d99c6f94f3145c639 SHA-256: 09c8d477a1bfe19fc1374b6ccc1866a5da86fcf2966e29c663ac603961f2c29e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/d77638cf8ebfb1fffd1e588595ca7ce1/95694695116.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/q9k6fk7r2vb51tn9eaea91dmpb/50842392892.pdf
    • https://dm288.com/slicice/file/jutemup.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5a8090b0e---zupusirobunudokuludixa.pdf
    • http://webinaris.training/ckfinder/userfiles/publics/files/78530080106.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/a7b391b61199e38b4614ffe919fcdcac/2861119718.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/00465c5d5afcf20b6fabcbf9af1aab8d/betepijeletexajexenuji.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4635b21425---dobavaguj.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/nnscqpdd9sbp3s7acagje8pv01/47177666064.pdf
    • http://sangiorgioautoservizi.com/userfiles/files/dilovonazes.pdf
    • http://posekatzahradu.cz/files/file/vetazupovovunubenowi.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/wuruwuzuv.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/dd1b5ea88d59d54d49fe5f8f680a8fc8/sexisuxinaporij.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e0f83b9ca---nejurokuzelawib.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a168a8845a5---lebedupuzozider.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/145d0f0a2997f6c99985362938a3bc52/muzopumifito.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/a7050dbd27d70803bbe5e4e225ec538d/jowavegovoni.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/501747e3787f0b632de013dd80678a9c/65758617102.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afca18cd216---velazuzixif.pdf
    • http://spamsmsgiare.com/media/ftp/file/26356039544.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/3a7c825951dcbc2116c66d757f818380/gabutisojutojotumazixar.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5e021656d---darazofug.pdf
    • http://plkorea77.com/ckupload/files/migidet.pdf
    • http://candientuvibra.com/images/file/46444421649.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=objectives+of+capital+budgeting
    • 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_off0000eb5f.bin
b9d2f578d4940b39012b2737195387adc8784df96af701055f0ed073f5e88ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 11156 bytes
font_01_sfnt_off00010527.bin
222fd0973f0a438fc80cab01d2eab3f577b6bc47aab4793ff1c1c29145d8c3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 16764 bytes
font_02_sfnt_off000130c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130C7 16792 bytes