Malicious PDF — malware analysis report

Static analysis result for SHA-256 188d7265ca466eca…

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 20:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bd8bc93b8b02ff27c13a55ae4b80d813 SHA-1: 1bc800f2edb6a27823b16a7bcec60da00c147750 SHA-256: 188d7265ca466eca1fa653fbe91968167360775a25861460b9c901a92f3cdc21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://dijladentalcenter-qa.com/userfiles/file/27461821970.pdf In PDF document text
    • http://singer-island-condos.com/userfiles/files/1006442263.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a1da52bff36823723c96eacf87991c89/65713803047.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833b08efa5---50177910693.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c368e8b35c4deffc50b08de98aca98ab/56288194760.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a249c0472a0---dovumaxusogivupopabulitu.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/nomijewotevarovogamavil.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/zagujupabata.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fbdca832---vakoguwewufokibubumirewu.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/70559004204.pdfIn PDF document text
    • http://esistore.com/userfiles/file/60240939245.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/balapopolupotam.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6db5bfb11---kolige.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/sulukan.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/59793373593.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d57d90a21c---kajukozidufosowidorokama.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116f3006b272---mirowepigarebesid.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0e437295---92525529594.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210618_1E2C6641D79755EE.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/nuvuzajidajugakonudolo.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/jezosomumunojizugazivavi.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c793ce1a70e---maxagivaw.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/wutapunegekakozajiwu.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/95946804666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=interview+questions+and+answers+for+call+center+pdfPDF 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_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 10964 bytes
SHA-256: 88147164cedb71854074a351b90f4d71c257ad9a48804ff288e021855bedc5a1
font_02_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 18980 bytes
SHA-256: 0f2ce9832a17ec2ea15ed28f7c55bf99d611740ccbc8c73cc1cccac685ebf838

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