Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b5356daedf6db7…

MALICIOUS

PDF

75.0 KB Created: 2021-09-02 10:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e292cc96a7a47aadd083fdbed95f04d7 SHA-1: 7bb4557ef93385b3e841195075cb4a86381e34fe SHA-256: 30b5356daedf6db70a9eb245538e9bb25f03f7c7b56057cf0fe9fdc5877cae4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous links, many pointing to compromised CMS upload directories or disposable hosting, strongly suggests a link farm designed to distribute malware or phish users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://banghetretruc.com/media/ftp/file/80586707422.pdf In PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6482326ba6---196520027.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6235ee3dd6f1f63f52cdff65efbb90bb/magizavawipiris.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/7468178785.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/1gpn339imqsdk3p7vjqa180bt4/foduravelow.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/xafazobudex.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608390e947e1e---zepivejokuwixutajobeb.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/96430949477.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/20722766539.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/pemugerinumugojemufutofa.pdfIn PDF document text
    • http://zuche0551.com/upload/file/42510740910.pdfIn PDF document text
    • http://psmpetcare.com/clients/76030/File/fafovenosur.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/55435237544.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/92629917699.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/suxamir.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210703_28C8F1745A00DFFD.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a3f51oaahcncmaggjed9imjk26/zuxogifiwidamuladesigoxi.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/rasuj.pdfIn PDF document text
    • http://pneusmarene.it/images/file/7879901771.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/30854789865.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/06868bb15f731ac13aa74d98fa298c4f/20755079505.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/7f7a3e6f5f3e4bde4d6490247c392a04/wisabimuxu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2deb3aec833fa02a6fd968ed38a30b10/mowakusanorajeje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cleaning+metal+with+vinegarPDF 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_off0000c656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC656 10448 bytes
SHA-256: 78f6e6f57c739c92decd9125bd28bc2f290f1ba96d778d3d0c3a153b882ae1b2
font_01_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 15848 bytes
SHA-256: 79fd7bd91eae34a58d831c92dbacd7d3851f672fd1aaf20f666de3bfb7494ab0
font_02_sfnt_off000105d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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