Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4f8c8cb6538f96…

MALICIOUS

PDF

99.1 KB Created: 2021-06-30 02:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 15c512d0062a71bfff0cd3d479f77fb4 SHA-1: 740d16e83a0c77f0003ac1b32fafc8144d69cb2f SHA-256: fd4f8c8cb6538f96d253b422bc3e89fa0f2ed4f8f9030fcdb8ce65054caaa269
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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://oniceh.ru/uplcv?utm_term=ghost+in+phasmophobia PDF link annotation
    • http://atenngo.com/admin/sites/site/documents/73130411876.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee775f457---wulolisewuguvazafupogigu.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/ratifakokagobanefano.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9ac4bf238a92e435e3c1a157d7d170e6/jadudozoxuf.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/tuxifatajekir.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/dovonorujuxanibufodegobu.pdfIn PDF document text
    • http://chikatere.com/Upload/files/xuzonop.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/segidujagatalugorape.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/lobobidenuzodigewifoxa.pdfIn PDF document text
    • http://hifi-markt.net/kunden/kronhardt/ckfinder/userfiles/files/tefibasatenozugopeson.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/81765542629.pdfIn PDF document text
    • https://atl-50.com/files/file/sopetomoxunuzajibevo.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/polutenuzipejope.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/70369851236.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7a3b9804f---juvuridumed.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/7fih7n6ee6kanoejm00o6cbp22/rogubiniloradetatoziruke.pdfIn PDF document text
    • http://gptools.net/userfiles/file/dibesedisaxozolikan.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/50642996353.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d785d4fa60c77c1c30e62197bc1c0c67/89970295335.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3dce1449be2256c08c1e1f3118deed15/67721086037.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/83091665780.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c3fc665df245b209c10ebf073f60e21e/jaruf.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/864dad5dbce261c174404aa7c30931c5/wazubasekodeboles.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792090d9972---karaxugekelojud.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/zatevituwerenu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 10416 bytes
SHA-256: 6b254345d06f4a2d01d913474a94fd9d768121cbce48e73048751ef2cfc7ad82
font_01_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 17340 bytes
SHA-256: ae0c50501bd675b10728ee4019429d8697db9c7447ae5c681658d7c39122232b
font_02_sfnt_off00015dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC2 2200 bytes
SHA-256: 06e658a9d5933325f9c5df77539670f87c123f8f327497ae6df935b4a9e03490
font_03_sfnt_off00016789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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