Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c9f608b2d0d30b…

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 09:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bef7b4af2612edcb856d86d513f877d7 SHA-1: 3026ba5b9c7e35929f67e0f6701dc7dd193bbd35 SHA-256: 06c9f608b2d0d30bf6116eed62ed7d1c4510b2ebbd308591e398b3d6fc5ae75d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links indicates a coordinated effort to distribute malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0c3213f3---fejil.pdf In PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ba9e6bea9---76064908800.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098427f07e4e---82877643935.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/51791810825.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/1lj8eq929o8uer1viarh2fb4d3/90174443068.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607398213e32a---vidazisudesewa.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160821b078b972---39264053094.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/majuwabotelexibobot.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/61037343021.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/vozejomagogukurufi.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/1281228787.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/8204419039.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3f0bd30f---vosipotevagelo.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746f57dc4e4---ganovixiduvabogivew.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f7f2e1b4---79348872780.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1f37d29f7---zijiligoxexupezaxusefoga.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/dba50f9217a04ffbfe3f63f9a5e779ae/pevukawisir.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/319ee6ecf0a6e0eb0891e246cbb589fb/votudarekipoli.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/a2c211bcc5963b5540bf37cf695d46c3/31125370829.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/17890779044.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/torikaxokatawajefimem.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa819de0d---73449105481.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/rafajobekabowuwemazuwabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=consider+meaning+in+englishPDF 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
font_00_sfnt_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 18524 bytes
SHA-256: a3af8d598c83075320cd2d9cdd95f36259405280269da7162671cfef7999b09e
font_01_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 16268 bytes
SHA-256: 4ce60333086414621b411874360a957007cd958c7bbe83efe48d5798138ab069
font_02_sfnt_off00012084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001389b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389B 10628 bytes
SHA-256: d26b69bbb38ef777e7c78664c2a00f062df8aa4ce3dc6d94b8d533d7b7adc126

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