Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9abca6a8ee6c9a9…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 04:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 62d66e6b468b91082128866d6dd6f685 SHA-1: d3da3bdfa05b940283440183415485f45b1af21c SHA-256: e9abca6a8ee6c9a93e31002cf2b6f58a39b63481fc34bf2e5914bb7dfff5fe34
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://speak82.com/_UploadFile/Images/file/19714077130.pdf In PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4010299461.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/getonoxegivimebusesisida.pdfIn PDF document text
    • http://househouse.it/userfiles/files/konewol.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/wefutefurad.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/924567e03903531d0d505d52ed2d6722/67903562107.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147850bdd42c---30065199718.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/jatitaromagakevawinuti.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/futorupezopegamijosapim.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/warufijumoleso.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/morupitorelonigo.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/84595661924.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/lorigujajitonutumuropusod.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/tisenovopet.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/20219416639.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e4243939f---49660236868.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/sokufav.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/58935154844.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e035648f7---dibabefiw.pdfIn PDF document text
    • http://only-svet.ru/upload/files/99668274306.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/75304932213.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/rodutalasogono.pdfIn PDF document text
    • http://ametansk.ru/uploads2/40378048419.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/61035222383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=my+hero+academia+season+5+episode+12+watch+onlinePDF 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_off0000d70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70A 11280 bytes
SHA-256: f14d5f1edfb4a5031fdfc9075490902052ee01316d662b694b3bca6b2a192e10
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 17156 bytes
SHA-256: 67d6851a477d57df316807dd8a526fdf68693ab89e9d58881fb46a19c5e2d524
font_02_sfnt_off00011e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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