Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ea5538eb7f8b5b…

MALICIOUS

PDF

82.7 KB Created: 2021-08-19 02:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 70a46d75b1c3d13ac5ee8fd2a430a104 SHA-1: 07966e5967b5873706438f64dae2329ee5da8f78 SHA-256: d5ea5538eb7f8b5b7a2a23ec01809a687486d3588fc106f2d800ada4666a7ce0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. These links are likely intended to lead users to phishing pages or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://oniceh.ru/uplcv?utm_term=in+another+world+with+my+smartphone+light+novel+volume+23+read+online PDF link annotation
    • http://mediaworld.pro/ckfinder/userfiles/files/33836813572.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/2ic83t0kaij9v179s5b516cgei/71375302929.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/b455ec798b9e00f37ce7dcc2c91c5176/69542417978.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/97722792973.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8d0ce1a69---52976629011.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad44303a74a---bugimamimelof.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/69oa6gn42hu3elsgv2t69imjes/95935335665.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b4e636126e9f296a139983e0de44b589/29167355938.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/82787939554.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be14c827d31---golikuvaworunivufu.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/vadomakevevitejatefado.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/9120996073.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/tozivovegepudedob.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1807d824---41558854928.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/wevoxilinisup.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/2fa6e721840bb64a18144030ba0df375/92840354432.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607488c243f86---4717508369.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/f777c913900136c4c8df03a14a428b0d/wezojonejanumamewa.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/768608008.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/97528375970.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/nawawaxewuratuzojuda.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/61416683763.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_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 11448 bytes
SHA-256: ebbd5d5cb6ac4f1ad37df40559a68754fd4eee8db2500dd933f2bc19a573837a
font_01_sfnt_off0000f819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF819 16828 bytes
SHA-256: 595934caa3c0cd4d815c09267bd3c14dce0596ab951d2e34b5a1b99fd658e29e
font_02_sfnt_off000123dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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