Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ffe655ec566f591…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 06:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8188a889aa6d24a767d0cdce14276f68 SHA-1: 6b85c3ba3d82b0f0e703b1520899ace5cfb96613 SHA-256: 1ffe655ec566f591ba3a106edf52deb8784de60198eb71556b05dcdecef8d27d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3b8a91af866755a610f7ce541e38365f/22718003113.pdf In PDF document text
    • http://medicamarsala.it/userfiles/files/28608309702.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/7e1e95911d14f327a9a0d27748db142d/97585768136.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c97fa89560b8af440cff93566c2376f5/82151434415.pdfIn PDF document text
    • http://sun-tes.ru/files/file/lolomojabib.pdfIn PDF document text
    • http://jar-ted.pl/file/sijidakisonazonunaluwimi.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a59a3a706---15105003549.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f1a2cfd476356f743e5539dea759b257/busemulupipedela.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/ketawiju.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/lumenedetimusojez.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/fafawutefogafakijawubiwa.pdfIn PDF document text
    • http://ciskmv.com/css/file/3382056556.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1611497cf2ddfe---wisewegagep.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/xomojebirulo.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/nepibanadizosoduwa.pdfIn PDF document text
    • http://foodchemsino.com/d/files/49303028768.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/5070ce2c080972059e55d5ce79c12df4/58645658545.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303ddba61b9---tisemenuzix.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/gujagodewamo.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/72782211240.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/66004402798.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a9890a3409dd70baa1a50c0d5935ed34/19112196945.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a7969957394a8a7de7ceed1254488690/sotijubelufefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=simple+past+worksheet+irregular+verbsPDF 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_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 11156 bytes
SHA-256: 7f1b006857610c05994e267c6f9c54a6fb71d12be3f7eb4fdfb430dc25f7ce1a
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 19304 bytes
SHA-256: 6ddb83bc8abafd9ba2ed50031a560c17e75ffec134991e3f3f02f07df5df2ab3
font_02_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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