Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4354a2b47e548f…

MALICIOUS

PDF

95.3 KB Created: 2021-09-10 22:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: faa5cd71ab13ee4fc7b2f5a2c59de477 SHA-1: 9d80571cb7b156629795f2de7ce0fc1eda4c9b2d SHA-256: cb4354a2b47e548f0a3101b538edba11cd8c798f9903a713bf4a678e3b41305a
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. The presence of embedded JavaScript, although not directly executable in this context, suggests an attempt to obfuscate or deliver malicious content. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • 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 https://laborke.ru/uplcv?utm_term=rmc+android+call+recorder PDF link annotation
    • https://mrdak.cc/uploadfile/files/85627923122.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/27034084874.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/89130409291.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137613445ac6---fuvigewefofasa.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/vosifatotosukugemora.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/sawamerizu.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98114335468.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/damisulu.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/fuwezomuf.pdfIn PDF document text
    • http://secoinblock.com/upload/files/45028749727.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/60097413939.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b337605b2c515b26a3a595f3d8229e5f/labanixojiwitupuworeril.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/25359180273.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/xavimuj.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365d45aa981---68029217290.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/14137851924.pdfIn PDF document text
    • http://aimic.com/userfiles/file/zakerale.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hp2prcg8p13mtc2ihpjkmr7in0/72251175317.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/lanozakapepomudaxikisi.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613896e2cb492---gulusekexejibanilixokosud.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/xirutitariva.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/kuvazunidunopuvo.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/xirepimejixinaxi.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/60010322996.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/zodeduvivigofu.pdfIn PDF document text
    • 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_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D7 18860 bytes
SHA-256: 0c12a61dd873a151f96ee8f40c160f1cb7fc6b4b21b9944ee4edc58a6e9ceac5
font_02_sfnt_off0001580d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1580D 10308 bytes
SHA-256: 86c726317e9299d84be020cf36a3407f25a56088837e44edadf77cfbbd32be61

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