Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db673012a560964…

MALICIOUS

PDF

104.8 KB Created: 2021-07-02 03:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bff78b4368eebc687d1d260274ffef0f SHA-1: ef8666614d66caac5a8bffc02c4ff9907d075011 SHA-256: 6db673012a5609646747472d11b8c467479428952310c18a7780bb1b840ae6e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e45d6355273057635603f482d89ffb87/pugamovokixakojuf.pdf In PDF document text
    • http://thankschicken.com/uploads/files/99931530962.pdfIn PDF document text
    • http://hydrem.ru/images/file/88063778061.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/5425106906.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/70532787154.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/69991943516.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/31407762427.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/sozun.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/79748167366.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/kitee5e8jpn1ccdpl6pu8onpg0/wojimetozidaluniz.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/67602885360d3203508f8d.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/funalikigojot.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/sebop.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/f9kfm5ej6vemq8tes0erap3kms/tomilojo.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/04d71c20f43c3cf708df5a0aa36fa390/gaboliluvotidowagir.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0f34ffe87b623a2b483f70e083d57cb9/wevuxerujo.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/b819b69aaa61e9d71cb15bd01a74bedc/gamuxakepofis.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3514ef00756f95dd7be21928c93f2bf4/sowipixavufefudakepisej.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607835e1e5f7b---kelimuzenitalados.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/r72113vil1bv6l2t6g0952o8cg/38870385595.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/91645949490.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8ed7df24b---17807389609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=wordscapes+uncrossed+level+123PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/e998ee32fee4ec505add44bfb9c1ac76/18271394602.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13743 10820 bytes
SHA-256: 4e7a3b6499f459f8a1c660c4736cf6374a72641229a389e9d6719b5aa8623d9a
font_02_sfnt_off0001507a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507A 16864 bytes
SHA-256: 2d7b133414d618f3fe957cfc8eb1d0b7f1b2ff9badd0ded96c2149a4c5b9bebb
font_03_sfnt_off0001680c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1680C 17316 bytes
SHA-256: 9e96672004d6a01b221d8b74952236f8cc0222b565d0b5260df29af1456bb206

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