Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6002179e792e3a…

MALICIOUS

PDF

99.2 KB Created: 2021-07-19 17:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7de9b39477a5dd97a87cb6709524eb08 SHA-1: bbad089ba8f40ed885357955ab968aad5e0cb6ff SHA-256: fb6002179e792e3a29b100b9aa9925f262b1d98ba4cb42c63a574379a655fc2b
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://goldenrulelodge24.com/clients/860883/File/neriniporafozixevol.pdf In PDF document text
    • https://easybuildapp.com/files/uploaded/files/35082200438.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/17898688037.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/81682785839.pdfIn PDF document text
    • http://derma-dts.de/files/file/29612558927.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data//files/zexefebitimilo.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd0cb6c22d---pibuguvepa.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pomuubgjkom509jqk0h06faah1/gibuxuker.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/130he05k4rdo4ppbik5uso8pge/2658096623.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/3ee4e23e787fe30cd5c23f1f497d829b/85042961358.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s80mfjls3bjpijkkj1tgoml7k1/fetiw.pdfIn PDF document text
    • https://emprenderem.cl/files/tuwavavuja.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974a0f30a69---lekirefi.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/falodidanurododunofug.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/mumoputuwugiwofaweduv.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a3b8358ffc01b6a819fec094cbaf0efe/pinijixawiwififez.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/34175535435.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/48533386925.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807edcb156c---63315613038.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/afbad938d53e5ad6d055a9e41814fef8/sidebukiputami.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/31thrgdc06l26pkh9afla6hd7i/boxog.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/2mq0fogav2nksa4kcraclqkagd/rumexan.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/62956875613.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5e75771b7---mowaded.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/50850475945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=so+you+want+to+be+anorexicPDF 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_off0001231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231B 17084 bytes
SHA-256: ce9e11fb873c1e84b72642bc4fc646b8a74c0409fac4ffde259b0e7f9f493345
font_01_sfnt_off00014eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDA 10628 bytes
SHA-256: 46b92f5ca031497c3c7ced4eec5d08a73e834218c42329dc501db0fa23a92a88
font_02_sfnt_off00016773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1