Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6e2eb10d1ec6c1…

MALICIOUS

PDF

80.6 KB Created: 2021-08-16 10:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 479a3dfca8b49750328b1e10f4567aa1 SHA-1: 1504fa0a6a4cce90a9145b3f7cde3dc9ea67dcf0 SHA-256: 1e6e2eb10d1ec6c1fc26df9b8da540f4f5001b9a8b33b23f6d5558e3f79173fb
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 or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common technique to host malicious payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/finixokapogasililuj.pdf In PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/1dsmdjn075eis9tdq7lcmthk49/386231666.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e24b5939a2714b925ddd8e38d04a013f/69134889072.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/68325368222.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/60365759313.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/gidomirubin.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/490603665.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/lidiwego.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/72344575506.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/wiweworumanapogatofe.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021061704342973499.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/92315620334.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/zameganemubadipopepofejez.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7107ca10accddadb69d6ce4cdb1b76db/perigolajugesakulorap.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/ritojejulizusepadojesuvi.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/7044950144.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1dmr5tg3okn3sqrb3svo8eod67/dubiv.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6558e7bedb---88609628330.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a20102a7409---lesadaruwoxo.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/ziniwezozupetusokonaxadi.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/gasifimowikoxagafamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=calculo+tomo+2+larson+10+edicion+pdf+descargar+gratisPDF 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_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 11388 bytes
SHA-256: 364ad70f798f84630e9fc90745868b8b34e2a063c08ad006b3a207147234f830
font_01_sfnt_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 18196 bytes
SHA-256: e8cc3b5960a00a601897d06a8bc42a07f945fe9f07d8872c7051055e512c8e21

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