Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b8f98ff37826e4…

MALICIOUS

PDF

74.8 KB Created: 2021-06-27 23:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8f4891e12c635239f22e5440e9276228 SHA-1: 968145f906c825a3941d50790498fd890e1fee15 SHA-256: a5b8f98ff37826e4a1d18b8c1bca57fd88adcf91edf30aad99f12b85cbe9cacf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs further supports the attack pattern of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=color+and+light+gurney+pdf PDF link annotation
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a20851cc528---linosabemugunuve.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6abe2a2c20---xokexifu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/442a729c7c79201376f1f46cd1e7bbbe/gerumonijuwokejorixurigex.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4b0d6r4c3ejrq7936jo0h6j6uq/kokobin.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0bc80072c8c208145ffd732c3a182f64/69556286951.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/3d3125d96cd1a795252c0f9724e0df1f/65232448425.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0f32135ac407d2a03bf65455b4b42c1f/vemisudifenekolov.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/o3u79ftbo0m6pslghbtkc8r3jt/rerevuparapozudesizutefi.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/mn40ic83qcp7venjv8mlvvcg1g/63056171550.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/357280635434cb87c1be5d4e9145c9da/55265305346.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdc320a205---mawaz.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/mokuvufedizezibum.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/nusolajiwinapumux.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a931a065948---4054934987.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/fekepobimopojezolas.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/4973531537.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/vebekuvokogerevonij.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9da2c4f7fb7054ecee6cbf33d530c53a/kazujixetajotiw.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc0da0c37e---tuvamudokamisur.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e48761957---95273690541.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb18e2338c4---nivekutale.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/83155676277.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086ea5648985---38791327074.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f247b023a---wavesepodorone.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/muvinezudisuvagularigip.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_off0000c4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F1 15584 bytes
SHA-256: d76e57000406e926a3b72299da2967cd339eaa19225b65bba48e593794e9c45d
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 10856 bytes
SHA-256: 7f134c95ce137ec769256ed380129573857d9a5609e8abc18eaa34cf686355bb
font_02_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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