Malicious PDF — malware analysis report

Static analysis result for SHA-256 1948b7196ea3746c…

MALICIOUS

PDF

90.3 KB Created: 2021-06-29 05:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a362226983071d13444377891d7a52d0 SHA-1: cc0661a2f58d1c3278c8a61728af02e704b4c171 SHA-256: 1948b7196ea3746cd2840348c66c3be3635664b7d8a078cff9a143f25d22bda4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The 'wkhtmltopdf' authoring application and the structure indicate it's likely a crafted document for malicious purposes, possibly distributing further malware or leading to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=beethoven+bagatelle+in+g+minor
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607954cccf59b---vatefisuwewomokuviv.pdf
    • https://facades-et-traditions.com/actualites/file/manewat.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aea498d59b3---77956824576.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/7379db2417f6253b489056abf1d108a9/12959953693.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160767082a5972---jivivejonoxodekosibu.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719ef863571---rixil.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/korurimixu.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/lelilafezexapa.pdf
    • http://gptools.net/userfiles/file/15786015601.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/cfb439306288d892ffd18707d6b109eb/jivarano.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/jejuridolitokuvilikela.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/bfb9507d5b01a41aa0f7d5ad45d10a1a/lumutejev.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe6035203c---gomiberusit.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/e9df9b5e9b19d7c80dece95189c5132d/91892125991.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5fed5d466---90968896916.pdf
    • http://lab4050.com/upload/editor/file/wizejosajib.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a149c23c376---vowusil.pdf
    • http://tourister.kr/userfiles/file/tunadolapuwavanojitun.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69322d8e5---xodixak.pdf
    • http://bjsprt.com/uploadfile/file///2021051806582397.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/e006e70b29fa59e014a56eb725aafad4/10757995108.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816bc0c5685---17332183222.pdf
    • http://bocghedanang.com/media/ftp/file/tegerolonudug.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078335c12526---8512340793.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570e5228e9---31626575469.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/534d8acc4e1ffbe7dd71b4a9849fe164/35901192408.pdf
    • http://vizugy.hu/uploads/files/womasep.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_off0000f8b3.bin
8eb32dd535a375abe59ad40c5d2ba09699acee7036cffb9c3f32dd0169ae2e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 19224 bytes
font_01_sfnt_off00012945.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 16792 bytes
font_02_sfnt_off0001415c.bin
637f2d6883badb636a9fbe2c4660c0b7c896b2f14a495a2fa0bbe3dc542afa48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1415C 10648 bytes

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