Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e12dd9d9be6d97…

MALICIOUS

PDF

94.6 KB Created: 2021-06-26 22:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab7518b44d2e9639501aece3fe29781e SHA-1: 7d82d622c81b00a5ae6d7744c72b8921491a5bd8 SHA-256: 64e12dd9d9be6d9730642d2be821f52a184bbbd8d2e1c8cf5ab52d7669319cef
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://ketchas.ru/uplcv?utm_term=the+back+out PDF link annotation
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893da1de1c6---sosepes.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15cbd2d11---31522444093.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/xipudowujusigoxomozowu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/18deeebb937e1d0f296f6be99474737f/zevoraruta.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/kurasanajolojitenef.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8a686defe38440ce81d6c951104f6754/60502483466.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/37911802083.pdfIn PDF document text
    • http://fdceta02.fr/catalogue_dynamique/file/35812082135.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/3788798671.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/vn978actmdqvvu2s2oar9vnku0/jawosawoxuvuduzen.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/66bc6c90ed593ad29c1e40fa7ad3acba/dofikezope.pdfIn PDF document text
    • https://bdata.vn/upload/files/ximajog.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/utb7v6892jjhteegfm2m95bjd4/sabuwiremotu.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/fepon.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/lubezunitedevizazifex.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3867d17e7fe25cf9dd502ad334b6359c/92106597009.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/535d6afdac91399107cb615859b8fe70/51711635754.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/57546535768.pdfIn PDF document text
    • http://vodnik48.ru/content/file/wezotolozorij.pdfIn PDF document text
    • https://inncredel.com/uploads/52163647799.pdfIn PDF document text
    • https://fallsplat.se/file/65364659157.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39ac223ce9---vofezelipitobomumir.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/zofupupasiwixuradapefiz.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/fa0377i87e9g2erckp38e108q0/12552658695.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/8992268097.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f0af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF0AF 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 10112 bytes
SHA-256: 4606fbe4ea9b433eaf1f61dbee6ad79c481bb648f535efd13c86475154608087
font_02_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001265d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265D 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_04_sfnt_off000133d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D8 23120 bytes
SHA-256: 0e763e20acc1833b08b9686a08799fe9c3f30bd11367e96e4e1764f034e297a6

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