Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeeea7d9623aa8e…

MALICIOUS

PDF

83.5 KB Created: 2021-09-11 00:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 71057cb353d436a9fe0a92e435628134 SHA-1: 01922262fa460b6aebe32a71e96dd5e5eb1a4b69 SHA-256: dbeeea7d9623aa8e59787cdb235de0df33b5f65beaf81f4159d9f848acc861c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ed158b065---ragosokunov.pdf In PDF document text
    • http://conblocmanado.com/pics/file/bufonurusiwizerev.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/situmimanibebituvewigovo.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/zoxavunig.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/munufibuxiluleguzesomaw.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/jewujivinogajibana.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/2968826496.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/92125699765.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/16520692538.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210906092914_jis4gm.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/edd7e8f1cef24f07026d99a45f91f084/53326355203.pdfIn PDF document text
    • http://pnalog.ru/images/file/20030839470.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/zurimejusagapibifurum.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/75841077211.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/16358563014.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/97952193276.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139923ea6946---56014317291.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/nunazuvi.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/19838149381.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/silakevejinipone.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6bb926484adebd53941b9dd6c7e69a44/51592644006.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/bodufumanifawetijoviw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=incomplete+combustion+of+carbon+equationPDF 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_off0000e069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE069 18204 bytes
SHA-256: 9fbf627bab008fa0e600b710c57b02786903e0822288ef967f2fee56b858c737
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 10976 bytes
SHA-256: bead89187cd78c87a028ccec2d5368aceeb8e85ee0f55d8281792a4cd2d4d710
font_02_sfnt_off0001285f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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