Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae373350909ed7a…

MALICIOUS

PDF

97.2 KB Created: 2021-06-30 11:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 37bd6fac876d9be730bf0d1effc59250 SHA-1: 57009d938fb4b9ea32dba3692c7bab25c1332e6f SHA-256: aae373350909ed7ae006b52a01d3d5e6d7a3f047f158d77768f4f35ffe1d38ca
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The file's structure and content indicate it's designed to lure users into clicking these links, likely to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/0i9ksi2b0kqspph67flm540kq2/34214683698.pdf In PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d454d28e9e1c2df845e07a7795564e3f/79451700956.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a944be10835---xexulasazomuse.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/74530838038.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a47bda752de6c63d492be56f33a4b37c/tovokizuxitikig.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/d840bcfcf89d636648f728f76ec461c3/52797933729.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e6978e18d---97495307861.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/xelevupixisuv.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/7cbfa39dacaeac538a6914ca381ffff1/kejox.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/zurusog.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/mojezoxalimodulawu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2f16b3ddb437533f8cde2b8f5601357b/23056305225.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a63faa37569---12578885057.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9be32d3f---pososegesumufugadinifita.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f8ab94a8a0b29348a0704f599947db51/rebowakenug.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ff0ae3b57---56728630050.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f5c9d9e6---muwinatugovizot.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/764e8e76855dc6c48c805f94a7d4f334/80090669106.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/levizetekaluvixilurepixob.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b40751d40---wopodosisuf.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f7505fd8a4145d9eaa0c0c79136342e4/40367128851.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/fonaduto.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/gusetomojogejuneji.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae1aedef6---12636697588.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/d2c7b6535de293327294c1de05b624a7/pisepawuriponagusexeget.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=horny+meaning+inPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013d8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13D8B 19784 bytes
SHA-256: 3f2ed062cd55aab8799d817f71644b84f42cebc8209ad485a77a40c81cb34cd8
font_00_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 21836 bytes
SHA-256: 86110ede69fe6b1cc976955e826ff853eb2eefc94943a04fa36661b52c7ce050
font_01_sfnt_off000126a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A0 10244 bytes
SHA-256: 4adf860b13aebd8543c185fd3e3af1a1ab1ef9158bfb480b9ad57df12efe5ad8
font_03_sfnt_off00015db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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