Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0493992f2015d1c…

MALICIOUS

PDF

85.9 KB Created: 2021-09-15 15:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f6dfbf2f7c5cdc3726d98c6fc3758fb1 SHA-1: 8fac998ad2a83f96801e7be2ce19d7f6b81b75c1 SHA-256: e0493992f2015d1cfa0d0df9d865baf2345e56524d14d9dd64e415c51d65fd25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead the user to malicious content, likely for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=midnight+warriors+pdf PDF link annotation
    • https://chetanaus.org/bheru/uploadfiles/file/zagiroturekumezokiriga.pdfIn PDF document text
    • https://curvy.tw/upload/files/35457976357.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/wanafuboxawekezukutod.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/tilaboleluxalefuwi.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161370db51286c---73421969186.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/vejobigebapix.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/lobepo.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/bisimarudo.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/60890092417.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce037d8b9---27653705275.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/93186855834.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/pijavakusitiperelus.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/84273641726.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/furanutama.pdfIn PDF document text
    • http://cpils.com/userfiles/file/lutapiladipadokageweg.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/65063386426.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/wesaxumumevul.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/40953849523.pdfIn PDF document text
    • https://2winit.com/Files/files/23568997888.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/jixeb.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/59893272501.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/gamunugitosuno.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413157864b0---15811305688.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/87879178625.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/lawobomigugikuxexito.pdfIn PDF document text
    • https://angkagenap.com/contents/files/65576056166.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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 20092 bytes
SHA-256: 465d9ec05b17b90d27a8cda88c47e326554974c542fbf1160d97ac25909ada83
font_02_sfnt_off000131a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A0 10680 bytes
SHA-256: 1f40adf3fa15ced2b462100b29bd2b5ec8d801583d29905f3beda05de6cb136d

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