Malicious PDF — malware analysis report

Static analysis result for SHA-256 307e0f3833d5ce1a…

MALICIOUS

PDF

86.6 KB Created: 2021-09-01 10:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 30d3aeadcb88b160b5da65f6f1835939 SHA-1: b5ec6eb885f4a83c37d2c91979d090b8cc7815a8 SHA-256: 307e0f3833d5ce1a7528d5528068829b71dc2a6e8ac74d001f9c0dc36d386282
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9483eb8d---bivax.pdf In PDF document text
    • http://hyundaidongdo3s.com/images/files/59059911553.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/3800928263.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/18a00229b7978b8478031be99740810c/wiparinerifanuxejogeg.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/45634756344.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979b0cf2193---15417803700.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe5271e2c---38594283034.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/somefikegesenub.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/28d94b7fcb47c6b66b0814557fab0f24/73680587002.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/57803865858.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb124f3f3---94684483432.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/45184511300.pdfIn PDF document text
    • https://area5srl.it/file/64487916132.pdfIn PDF document text
    • https://mahae.hu/files/files/dufekofafug.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/70250368375.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085b5ad555a0---bivafedatexu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ebb2787d---98307348131.pdfIn PDF document text
    • http://hydrem.ru/images/file/28899692621.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16209877897337.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/44697522605.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/telonepix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=parable+of+the+fig+tree+matthew+24PDF 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_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 10816 bytes
SHA-256: 14a312b8d2c808849b0c9d1bc6cba8db25646bb0f9d2b39a335d077b34f2a29a
font_01_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 17888 bytes
SHA-256: 74bef84e838e0c0ff64800a05bad9680b4b55da6dbba43f12e7a2f33814d5668
font_02_sfnt_off00013285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13285 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1