Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbada4ebcbc0b24…

MALICIOUS

PDF

79.4 KB Created: 2021-09-16 07:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fda26a85232be8a231f8d302e46ebeca SHA-1: cbfd94f8bcef1f1e4ea3a8f629656f0b8da617bc SHA-256: 9dbada4ebcbc0b24dd972a25d59959c4ed3d9a044cf0d7d7f0621f915acaff21
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous URLs, including those with 'utm_term' parameters, suggests an attempt to direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://crysiq.ru/uplcv?utm_term=insidious+4+streaming+vf PDF link annotation
    • http://dichvu12h.net/userfiles/file/pozufedanuw.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/38202930646.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee1abc6a59---18194761688.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/37173204493.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/kazifelobawadumenisoritof.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/vazemovupekepejo.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/nazajafanugamupatajakoked.pdfIn PDF document text
    • https://tigapilar.com/upload/files/38706758985.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/piwowivukarumawapalur.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/57802551684.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/kumewanonalomojux.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109011405287067.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/40654850528.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139caf6a1a17---vesezonoxebulunifo.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371cd96b0f3---27812651570.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/forerodejakawe.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/nanenanalunabofilateporer.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/meloz.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/21969006726.pdfIn PDF document text
    • http://cuiquji.net/d/files/17462133765.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130cc870fd68---wugenalevageboki.pdfIn PDF document text
    • http://ty-int.com/files/files/91184748416.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/98037986969.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d6b9c041401912b5e0fe7f3008f7b63b/wobexura.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/869915dd5f0a3cbf16f0abad7fe4f559/sukik.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_off0000cd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 10848 bytes
SHA-256: 6238808f702e5e354b1413ec195b0eda56eab8a394892dafaaf171f9008d076e
font_01_sfnt_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 19464 bytes
SHA-256: b03e88d390a842d517d5a136d311855a3126e9a4cb44f9acb1294b99adcd8d38
font_02_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.