Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300a01367397cfd…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 18:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0a1dfa9594be6a35f8a0ee9ae2466db SHA-1: e916a77164ca305b9b2f9b0f319772710b8e891a SHA-256: e300a01367397cfdf1a081121f94c16c0d2fabe7bbb93497c63aa7749a021c06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely attempt to exploit search engine optimization techniques for malicious redirection, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=how+to+make+your+snap+score+go+up+fast
    • http://apsara.ru/userfiles/file/26672310289.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/okv4dfcdfjru77l5d2jqg4amr9/37897695325.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/91268ae85630ffef96520c126527fbbf/kututopajuwusu.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074397e1dafe---52776962557.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8341b2257b05a24f6fa8cac3fdc2da51/fuxaso.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609962cbdab83---12654792200.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7a7bc78b1ad000d2016e6972791eac86/sufewojotikovumobawe.pdf
    • https://amblamy.ee/upload/file/rugunizulurovo.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3a8b52a2f3802f7c6cceddcb88cffc25/40590669728.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/9pkjb8pacr0pm8k6jfc3il3m6p/namoka.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb24fd19e3---lusegiwokuvudutazopad.pdf
    • http://odpadykj.cz/UserFiles/File/kizokavoxikugisiwe.pdf
    • https://abugfreemind.com/userfiles/file/24893996293.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d60ad9242f00a914ff973b9559a76989/vivukugezowolale.pdf
    • http://lamachine.nl/userfiles/file/8710463834.pdf
    • http://stonestudio.pl/files/upload/file/mizodigifavolipokom.pdf
    • https://meganimal.pt/site/upload/file/16359865013.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef41952fea---28424809183.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f8aacb6e2---roxotu.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a950a66ebe3---57791960507.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/90a03176fdae4f48c793769e6833c100/79133443006.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/8vijdquc611c52rskabdkf9j5d/83074504007.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5461a5b5f76f52ff890e6dcf02cf80ea/80854243079.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3d605ed71---lilizugiwanutomawejemeluv.pdf
    • https://agrilaui.com/userfiles/file/voxazo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 16792 bytes
font_01_sfnt_off00010303.bin
22008ec6923c60d861419f079cf7eef474e03a481c7049b9329afebb68dbd8cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 11068 bytes
font_02_sfnt_off00011ce2.bin
47b7e670f119ba90189237174b1066670f0f2b5ac0fd0a2a88905b9e7a827917
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 16696 bytes