Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea26324f301b1a05…

MALICIOUS

PDF

89.9 KB Created: 2021-08-04 23:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1dd4e3c4a5c9948076471ca9738082d7 SHA-1: 23809b9dcd0e206a28aa07b84e650389c7deda7d SHA-256: ea26324f301b1a0525c7a9ca1790bcbbc9866278c5b0b30b12ee5e926a90478e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://x04ydivan.ru/userfiles/file/lerijafaduredewusoredulug.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ed2f492496d2d1aadd0d45016c0c2679/vufibivulenotuzijet.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/3524248651.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc43830cfe---foxitajiligupu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cb66593805fb1cd110578f4c026bf2a8/76690451745.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608622795a286---67981850681.pdfIn PDF document text
    • http://championsview.net/userimages/ninepuresiridifafewoxal.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7d2c4f6a543592f41939fe9516cc7e06/rebibono.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/34424649844.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c19674c7df5---96474355331.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/r6q51b1mnf0scsgap3qm1gj725/riseg.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a011ddbd3---68356559289.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/53067202930.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/kojexumawizokudivosu.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/15345199032.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160852d1fd1874---japajeterunobaju.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/99320700830.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/65532867060.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ckvi1ts8toul1us4ci56lmi67u/siroladukijezorake.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/nagidomominurixiwemenazu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8dd585ba786ea66ec52fb3ebd73011b4/25790422828.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6423290d4---wolobepakozidol.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95308e28bb---giluketi.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/bdd8960384aee690e637fdf6b8c42898/fuzozibi.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/4609944db42ab2cd496d6decd64a1051/4500485090.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b26d0ebf5---razoxewedisibitajo.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/bipuvagozimutifipub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=rtl8188ce+driver+windows+10+hpPDF 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_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 17056 bytes
SHA-256: 80a6cabc52da7731c0db2154c84d0cd308f7b8e8db42dc44e7b994df36dddafd
font_01_sfnt_off00012831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 11028 bytes
SHA-256: a36a336a10986ff41ec99ff6e1a2cb33e0feb09b927e42eb670e851bbbda42dd
font_02_sfnt_off000141d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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