Malicious PDF — malware analysis report

Static analysis result for SHA-256 8986343b751a895f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 14:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2ae8bb7c446377fbf27c082fe7f23742 SHA-1: 7f3c8fc3a334ebef640f1250ba20530c5aec5415 SHA-256: 8986343b751a895f52591e2a16c036acd81baf61675bdb13688fba123fb0ea5a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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://pixomot.ru/uplcv?utm_term=live+sports+channel PDF link annotation
    • http://travelcenterpuntos.com/campannas/file/kalesovibaselebogidadov.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d28b4dfea9---varojozamoredowibi.pdfIn PDF document text
    • http://qwerty.pl/_data/file/dabujokimo.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613aad1727df2---31408630495.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/61093732743.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a6a951519---65740273854.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/xelalurixeforojaba.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/borozepuzaton.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/82423406383.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/bapubemimalimon.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/39318031703.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/42022285500.pdfIn PDF document text
    • http://lactopad.com/uploads/files/nadeludenepiteroxusufis.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6e7n2bj3nu6948hmkpje9uqn45/7211355833.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/jukowajedexutadovu.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/vimanebewitadapuvenu.pdfIn PDF document text
    • http://fnathservices.com/upload/file/sobevevafemurowe.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9eea67526---wexobot.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/21834055699.pdfIn PDF document text
    • http://boldogelet.hu/media/fakarufuzitalafikojaxeti.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210908041354.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/14368424280.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/44150684641.pdfIn PDF document text
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/noronagojezasob.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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 10496 bytes
SHA-256: b2b8948095b58026c4efd2386b707dfeaf3d24430d11caf98ccce5926dbcc1c6
font_01_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 18436 bytes
SHA-256: 3b70c315279ea98d7da107583a1e3220fbc78e3575a579691f146cdc6cc3a6a7
font_02_sfnt_off0001298a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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