Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee149848d14c29e…

MALICIOUS

PDF

115.6 KB Created: 2021-10-11 09:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f78c2f4a0246b93d87210f6e34a7f417 SHA-1: e04cfe26a25a6dc1af3d8322af136706d74903bc SHA-256: 3ee149848d14c29eec37d67e05d8515b921ec41a599173a247ec37a1a8cbbdd1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a significant number of external URIs, many of which are hosted on compromised CMS uploads or disposable domains. This pattern is indicative of a phishing or malicious redirection campaign, likely intended to lead the user to a malicious site or download further malware. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://cructi.ru/uplcv?utm_term=paradise+lost+online PDF link annotation
    • https://weborder.cloud/userfiles/file///lusovamakosutedisusewedo.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/zewoduf.pdfIn PDF document text
    • http://skupka23.ru/upload/m/ditafopejedesisu.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/20222488565.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5dca33ace52da3e8a212b551828c2cc9/vuwixipenosimesaka.pdfIn PDF document text
    • https://suruburi.net/mm/file/50896557104.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/94388156929.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135e64b46061---fijezusob.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/genapazavawefoveba.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615ec9e6a7c09---73238161882.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/60634995205.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/kowilezepeg.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/5431465864.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/faf573db5de68560ae1cb486ca78b1e3/nulezutanezoxesorawex.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/kegikoxoxunot.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/regejifuzopajegupirax.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/38139214336.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/juxoxejidijagoz.pdfIn PDF document text
    • http://panova-art.com/files/file/20929613599.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/wedumejajalejozezugak.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/161608838980fb---24318272122.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/lisuvuvusujire.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/67586969572.pdfIn 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_off000162f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F4 21180 bytes
SHA-256: fd1787a8d54d1ddc2c192eca7409cf4045a617eba186ed6951f1abfb774ea038
font_01_sfnt_off0001990e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1990E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B125 10240 bytes
SHA-256: 0a475d414037993f250e57a6ea5baa4977a55ba9bf599ff3ef399da57ec5aea2