Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2130f79150cf77…

MALICIOUS

PDF

72.0 KB Created: 2021-09-08 17:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c0788c5004e92c513218ae2cab7c2072 SHA-1: 02050cb25e6859c7789ac32fbcb050d09e917cf1 SHA-256: cc2130f79150cf77653bf97845b66316831c7853035d492883642db80c464572
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://talesma.com/E/file/xekelisizezemuruso.pdf In PDF document text
    • http://www.amedna.com/userfiles/files/dugozuf.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/77812652843.pdfIn PDF document text
    • http://exosushi.com/uploads/files/terudufunivom.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/54928027016.pdfIn PDF document text
    • https://basisnomor.com/contents/files/9932544803.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/95993549880.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210907123210.pdfIn PDF document text
    • http://boldogelet.hu/media/nibosutukapavibuwulen.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d44f0811a---55308992298.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/bubalifefadelopon.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/wegiz.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/in1296gb45b23fid4bdlciq4gf/nogedefupotel.pdfIn PDF document text
    • https://funbugs.ie/files/file/pajapolekuvedaw.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132a27b41263---56221150915.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/24887503030.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/lokena.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/25289370622.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9139156312.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/85151307757.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/tidubadonabuvidik.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/xijiv.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161365da089274---naxevupenufukojewap.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/13486989959.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613237dae0f22---ponofowuwaxobumo.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/90081952811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ata+guidelines+2009+pdfPDF 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_off0000b7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D5 10944 bytes
SHA-256: 17601364fa07a153243b6f0056aca0a532715a42b028521d69ed82ba86a22f87
font_01_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 15872 bytes
SHA-256: 0ae7e67257afc5ef5dd3057b498dfb9f90dfdde1959ee8ff9c9e427a3b2e4357

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