Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fd2af31e8f5dc9…

MALICIOUS

PDF

114.5 KB Created: 2021-06-27 10:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 568025e409d96f912a5c4ed9d161fb31 SHA-1: 3e6e7a930c64cef7d771d95cfcd255c06fb87a1b SHA-256: 30fd2af31e8f5dc963639b9e68252c79843ebf5ab273fe817d537f6a6a0c75da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9718

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://agiusfuneraldirectors.com/files/file/fojuradi.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/tn4phdv25ad5aeivit41lgi02c/debupubinoxid.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160777669a39bd---88093716956.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210627_A8E6E4865FB8D929.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/jigelutugosiribud.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729769046e4---tonuzemiran.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ts6lhgoun34eodbmd64li004i0/kepoderajobexe.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/furimozonowakugesikuzit.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/leribiwinukilotavosolom.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077557d7c9eb---tazojotenafudolaxenavo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/rivmvaheg1red5cu0eq9j6g2k8/wivajugaxevokupijera.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cfeec86ddbcb318f2dd474ee2d6e25c8/86024893016.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b19f56e4c---50190663284.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5a3048b0c.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/31953200970.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9paq5f3ai316sdngtu7j191pk3/wujodato.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/jqla72r36mquedrf4vapthqv61/31021601826.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/14431526402.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad8912cfb86aa9a0f19a30a1bc730acd/12456441996.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a27b0c240db---22711976700.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c10c66c87---gotupenotevexobapebu.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8grlav9sdgv2qf2q1m4o2ofkd1/gibepasuw.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b85ff3bd6e---18772919139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mhw+50+shades+of+whitePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13075 10536 bytes
SHA-256: 5c65622f2d76b38f9fbba9d70cc0ca5d15433ed6f7d11bb4c12232313075c954
font_01_sfnt_off000148b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B6 19200 bytes
SHA-256: 75269f2a6ac61fad07a0a70572d3692d3e3cf0429d6c21660a82eace213355ae
font_02_sfnt_off00017b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B96 5032 bytes
SHA-256: dd9840d1174a6e443c78ba3fef53337e2d52b3ad711225dd14fb93ba6a34b4ce
font_03_sfnt_off00018e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E90 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_04_sfnt_off0001a3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1