Malicious PDF — malware analysis report

Static analysis result for SHA-256 466bf0fca5b01a1a…

MALICIOUS

PDF

81.9 KB Created: 2021-08-23 12:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 06456d96b0b05b4c0912f5f3ebf52132 SHA-1: a57ac02b43ca7c305eb7f97bb31bfcacba7bbf72 SHA-256: 466bf0fca5b01a1ae54792f37d1a3bb255ba88e9dbcb1df37d029594208a2d2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/99f7f35b6bb039a945521f4300a47152/balusosagowemuwivi.pdf In PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4871d324bf---10846869958.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160708c88c0d7b---5389373257.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/q5d15gmb3uk7ouaba0jgcfk5lu/limamebemomirowutapus.pdfIn PDF document text
    • http://rilta.net/userfiles/files/lopevaxowivulejol.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b339be23145---domuri.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/11643062457.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/573aea1f45db2e050cdcd938c67944dd/79414374708.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/felobafureronaropo.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/46151329643.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/41191603230.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/75526281525.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/49271803437.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/41222975129.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9f0f4881f---18650039042.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b18183ca179ac7d55054856bb59c2f3f/64611811414.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/76370992538.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210810/files/20210810102158.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/nuxefefuzawefenizizazenat.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/95613362715.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/87970655154.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160803b99893e2---98571051937.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/t5k9knn4ubmltqs8oqcemai7c0/91348827883.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b0a6bdab---97357081173.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ab2bc15727e7824208aa6761946530d3/kuvapug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hellblade+ps4+trophy+guidePDF 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_off0000dcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10988 bytes
SHA-256: 914f2a17c03e14220f31ed1c342a61a8b52f12f5fbdb4a8be5301e32425febe1
font_02_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 16212 bytes
SHA-256: 788bcf61135a90b12afe5d98a6b848e4a1f53c45cf1d177f74ba828cea54fc00