Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa1e35380a0ef8d…

MALICIOUS

PDF

78.0 KB Created: 2021-09-02 09:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c63686f97c3c7ff36414c4e9e6e5b006 SHA-1: 407a682d24a977e34b49187ac95b1a596f313233 SHA-256: afa1e35380a0ef8d777fffe6b898b9af5881b93111cba9d9fdf7ede13f8475f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9631

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://allytemp.ru/uplcv?utm_term=holy+spirit+i+love+you+lord PDF link annotation
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607449bb2c662---jobifibaxexurumes.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/a591500691e95b844969cdcf85562b83/zexoj.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/27789858697.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/posenaj.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3ef40623f---limusorizafe.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/1b8d2f3u2pkqgnfh41vj3qpbtv/javituvofasogubozuserur.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-2/20210702062048781364.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c88c7062013a4b5ddb67c613bd616601/misimomepesufusob.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9621bd8b92ba5415d9ff7874fedbaa9e/momaganenowaw.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/52320811340.pdfIn PDF document text
    • http://elma1.ru/!upload/files/54776379870.pdfIn PDF document text
    • https://wita.lt/images/files/55911454803.pdfIn PDF document text
    • http://polkovnik.su/upload/file/nibofunomopatogomut.pdfIn PDF document text
    • https://morabia.fi/images/file/rozeselisugenede.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/3789580426.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/bilimigigeb.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65396106744.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853a873de79---51630013329.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/81482740599.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/diwikoluxepikomiravefuro.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/16763431757.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/vewixufodepexenirupi.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/78424702500.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/97016119811.pdfIn 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_off0000d155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD155 10388 bytes
SHA-256: 3380722f06e04dc8e9998968e68da489b3fa9229310526f9307fc5ce71234dd7
font_01_sfnt_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 20164 bytes
SHA-256: a100b395870eae667a6a8c06890e44c40031d1d90d7b762cf42fb961e3c35716
font_02_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1