Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9e7b9d13feacb1…

MALICIOUS

PDF

83.0 KB Created: 2021-10-04 22:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2bb746eb620f0d2974804a743d1de494 SHA-1: 0601db6a860a99ab6fd22b370870017846795d1c SHA-256: 8f9e7b9d13feacb1398822098d584d88a8bf619068891485fced08667aed1515
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term=extract+text+from+pdf+scan' in one URL suggests a potential lure for users seeking PDF processing tools, which is then used to redirect them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=extract+text+from+pdf+scan PDF link annotation
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161599f4f11533---28651792821.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/47494901990.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c482d46d3c67ec8beab50ce70f7883a/xelip.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/48079725772.pdfIn PDF document text
    • http://grandfiltr.com/files/file/foragiba.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1632835295.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/61595183095.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/80324438944.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/61286897269.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/b3u16r9l8loiom6i51e47vageq/37558130380.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b66f8e5b82db7004a5363d452755bd8a/4610327505.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/zawopuxuz.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/gopumoputafolol.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/14467803650.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/texapufita.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/31978842395.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/96029729194.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/52930420749.pdfIn PDF document text
    • https://eventaipei.com/upload/files/wumomuli.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/71ae18ed05977e558a501d1d7d54fb93/58642052012.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/porapogiwebibuvugekuvo.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/38324923723.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140fe7f3bbac---xulusotasibomu.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/besisul.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_off0000d9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 10728 bytes
SHA-256: e18c659a1afcdc7b75dadabc4744b3863e0181b5d03277f6fe3a2425eb61bafd
font_02_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 19804 bytes
SHA-256: 4df210cffc15f0b3d58e84d65c2a12e86dd597a5ed558948b1568f6a3b1748b2

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