Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c007ab98ef20df9…

MALICIOUS

PDF

86.6 KB Created: 2021-07-17 01:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 15d6fe7576a05c707a1d12747eb7d8e2 SHA-1: d1978e57e76b33137df9b3e0cb8dcc5cdc68d7c8 SHA-256: 5c007ab98ef20df951024452aef457b961a99c4907db057ca8844cfb75aa71ec
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other potentially malicious domains. The presence of multiple PDF link farm heuristics suggests an attempt to distribute malicious content or phish users through a series of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/1f01680c296b6583307ea14d43097494/xawawitizaturikegaki.pdf In PDF document text
    • http://absigorta.come/file/52265431085.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/zepitozu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160846c179c220---jugoxokigi.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dphmsnr1vf1aikvvs1ogm8q6n1/bedugufororu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c06786fa---27448292888.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830e65cc217---duvotavitodijibalatatepu.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/37820996005.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076efa53cd50---manuruwakoji.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15bce08b48---31477550674.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c717c1dd1---wisezisekimezede.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/42eab64802a8e371d45685ea18054c67/25892557544.pdfIn PDF document text
    • http://jechtinger-wein.com/jechtingen/files/92594140020.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/mulanolenikulinevilije.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/buxip.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6804e0ef6---9322004054.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/19929586320.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/59568785506.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160880237c0d07---jilitivi.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/07670699fe963b2aba81b76849768d1e/37528704688.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d4ed6893---55691046899.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/i1c5tk627bjmun2aecjjtntj32pj5tla/57310814228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=wash+sheets+cold+or+warmPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 10516 bytes
SHA-256: d16bb532c8627be2a792e1c329529e518639797021454f9882b41bdc6c476cb4
font_02_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 17316 bytes
SHA-256: b07eefe6e40b055d48379a3e997889be6630fea39fda70f0a5b5e8f9238b13d6

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