Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d1d96a5d85cec8…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 23:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 079d2ee15aa1d64941041a41833dc065 SHA-1: 6ffa2ff756423c8dd4d3a84c33edbf4c14f84280 SHA-256: 90d1d96a5d85cec8c3d6c0ffe1e0f5c7068697a3d6a90c8d208b255e17993092
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'gta 2 download' lure indicates a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to facilitate the download of a second-stage payload.

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://philabc.ru/uplcv?utm_term=gta+2+download+for+pc+windows+7 PDF link annotation
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd4d3a988b---bufunamipor.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/59930908211.pdfIn PDF document text
    • https://fultoys.com/userfiles/burigixi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16142796874e53---81500638799.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/28915302.pdfIn PDF document text
    • http://93564497.com/userfiles/sinagekofogojofof.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132838567f90---nebisivexakanafikarar.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/64225481347.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/26929346593.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/18360752879.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/bosisonanezaxunejutipa.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/wudunob.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210901110131_5pburj.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/67576047533.pdfIn PDF document text
    • https://eurotig.ro/file/84266628796.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/61126974263.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/19635545723.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/13ab2d1638bcfeedddbe3ddd5b5149f1/fonelezizefutuzafa.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a64116b71---fenetasagivudidedaseji.pdfIn PDF document text
    • https://servicepapik.ro/files/popawon.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/fezitojo.pdfIn PDF document text
    • http://alocainghien.com/uploads/userfiles/file/dogajositasujukuzosiri.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/kefaz.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/34475891987.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_off0000e069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 10776 bytes
SHA-256: ef7682bd2cdcdd5eb411bc843bd02ed43dda57f4450793b8756856730816cba8
font_02_sfnt_off0001119f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119F 17232 bytes
SHA-256: 25f9b7916f3b3f9d3fca82511df2fd6666101269861fd7e7f1438e76642d355f

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