Malicious PDF — malware analysis report

Static analysis result for SHA-256 045609e91540ff65…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 11:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 101039980494e3602c9ebb60a16e09be SHA-1: 6b15e65533212d65b21b7352bbfaa1c317ca038c SHA-256: 045609e91540ff65a1d104f25a0cda0d18afd4e805246260321800b26d51aef4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the extensive use of compromised and disposable domains points to a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ketchas.ru/uplcv?utm_term=best+hero+for+solo+ranked+mobile+legends+2019 PDF link annotation
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160be96b934a9b---1451755071.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d45fa9843---71203593310.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///wipisilegikokufugogojobel.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/2695699351.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tibokatifamutejivuket.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/rurubozupakobogej.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/be4fb16dc9350026530a43188486a3c7/7007510981.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/37d89558d77360df459581d8bc5bdb51/xusidonedibuvebizox.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/bf5754684ce520732430f4fe29be0034/tadobagaso.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/nenivuruxirugawilaradog.pdfIn PDF document text
    • https://okna-stv.ru/userfiles/files/luliwepipepawegebovuxurew.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7ok0rsfu5ipgg73od3dcrcgls2/zokinozupanudesed.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2090fdd9---69690258721.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/gapinawubi.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/72553e59f39dbf65db8e4313c79dc494/38426420477.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19468bda08---85565346374.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c10d77d7c5d---rexuvamawudakesujitopujev.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf30b21cae---pugij.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a1ce5a10152c055dd70d1b876040a972/foxozarupizulu.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/jajapekaxumimovotasutiler.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/10181638162.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5ae2b20dd---banunitusupidabonirolipe.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_off0000ecc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 16980 bytes
SHA-256: 33a8fbafc0ad51f2f3e6e5279f888082c57f5ecba41c42c8eb10590d4de1500e
font_01_sfnt_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13116 11548 bytes
SHA-256: 5a844d1274a1e364b24ffcacf9c4351c51efcf7b12b8ac5b6333cc50259be543

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