Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee3e7c71f8ae74e…

MALICIOUS

PDF

106.8 KB Created: 2021-08-18 02:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5116b6d58f415816768ef80ce0ed962d SHA-1: 13b6eaacc0d591b7c55b452f9e796e6826b21a8c SHA-256: 7ee3e7c71f8ae74ed2821107542f0f8564c071dd9f2c28ac531ee72e8a872bef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV both flagged this file as malicious, with ClamAV specifically identifying it as a phishing trojan. The file's structure and the nature of the URLs suggest it is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/497d1c2331ec5e63b02ff311e3696a83/6248066276.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/827a74da194b693d356433a94bd8bc52/wulafaniwurulufubarimisu.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/eb10ekbir13d7nb31ks8p202t5/xumenemizatadeferati.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f583c2aa1a---1903173499.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/zudejizaw.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/35352870145.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/88678073409.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/binepurowonaj.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/mapoloju.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/tuwel.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/022da4318a2be14d06ac7aebb456409f/89239231344.pdfIn PDF document text
    • http://didopack.com/files/76871403248.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/r00e8sl0ptjldp05d19a2c7a76/sedunifixabefaluja.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090eeccf2049---32062930045.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726be8228a5---gozimisale.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/zugobudit.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/misovopab.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/e70a5da12d1f8ddcf03ac59e2d270fc4/94831238224.pdfIn PDF document text
    • http://vina2002.com/uploads/files/getevijekuzepog.pdfIn PDF document text
    • http://yuha.be/_files/file/67784554110.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17c195049---vulitujovipilusesul.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d4f5adfcdc063e08f424cb57913abb58/tetebiwinenefeweveketuse.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+treat+camallanus+worms+in+fishPDF 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_off00013f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15734 10780 bytes
SHA-256: 7d644f1016b4fe568f49e202d50c17ef6b78477357c8d59dc666ba98b84b12bf
font_02_sfnt_off00016fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD3 17308 bytes
SHA-256: 020fcb18047841965ee833e28e92013d5ad117d8bf2c392638b49203ba3b3c97

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