Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dbbce4af48e787…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 18:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a79b391635784e1e46348f95076da3d SHA-1: 08bf7e9532bf05ed20e977c59666c9a86fcbc335 SHA-256: 58dbbce4af48e787208eede340d8f824120e82aa9abdd892948ac424162645e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://wildzipper.com/clients/wildzipper/userfiles/file/nebapale.pdf In PDF document text
    • https://truckforceone.eu/upload/editor/file/42590105700.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e596d4e9c---pedetufufuwapekopin.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb30ad60f6---vokojapowamatexinujedufi.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16073bed000c0c---36024112575.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/jv5dleb5nfrfj9ocrephl79315/fofilixulesijipifelizijo.pdfIn PDF document text
    • http://bhs1966maui.com/clients/64750/File/nowegesirukup.pdfIn PDF document text
    • http://asqcert.net/files/files/renuverotedenukelabig.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/josetibijuj.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/08/files/210815091212.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/53963744945.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821bcb280b2---89885629527.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/kukewajosadofamubeba.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a79374d510111e0b5be36c6f5533d8bb/badazoxuseditegemi.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/39264730636.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/58755e365588ee4e3e4fa367bbcb84c5/89169035375.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/walivomowevewuf.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079712c517ee---mesofopitujejakezovow.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/68232378611.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/78032820389.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64ddcd9b38---zirifojibopesis.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/11b36d63363d0039dec58f56240971a7/28091997556.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/853012160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=urdu+complete+novel+pdf+free+downloadPDF 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_off0000daa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 10780 bytes
SHA-256: 3789776be00a60bd43e25a5942b4a3b524a780ac064ffa0449d97fa165492f81
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 18188 bytes
SHA-256: 5c6d37765e08a36f6e087927903e3240f284c4fe4e7a65dcc9d4f93f056cced9
font_02_sfnt_off0001227b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1