Malicious PDF — malware analysis report

Static analysis result for SHA-256 007fba3fbf7ce98a…

MALICIOUS

PDF

92.3 KB Created: 2021-09-04 14:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eade18e3846c03ce9b1ebbad029ee895 SHA-1: e5345316f2b259faee6dab1f210fa323fcab7ced SHA-256: 007fba3fbf7ce98a19d3dd7e275b1b0a56f2501a489c18421d5437b790448114
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious execution. It also features numerous links to external sites, many hosted on compromised or disposable domains, suggesting a link farm designed to distribute further malware or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lyzjkgm.com/d/files/tijug.pdf In PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0b57e1e0---30945036725.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d1fd4241d---nukowepusowilaxosojo.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/sakinajexup.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/42311643379.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160775f7a128b2---11286726291.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/26582871258.pdfIn PDF document text
    • http://htygroup.com/upload/files/jawirelufururugapebowos.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/40754276195.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/falosubobenadox.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/96497503390.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/pudotomaxanatupitepe.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5cab7d87d---46648866516.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/biduvudixibixamid.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/73538174078.pdfIn PDF document text
    • http://rayer.cn/d/files/vorimi.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/38875784200.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/titupuxopugerupa.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/amhtr071oo9t4v6t15o2iu5j01/baxukabutejev.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/14713561543.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d5b0ea502---dabazamebawozupal.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/latadotaf.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/noked.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/pukotinowudum.pdfIn PDF document text
    • https://kar360.com/resimler/files/82096880572.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5b3c221dac493056cba6cb6e8d42a344/sobojiwusutowagebijivofij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=german+learning+pdf+booksPDF 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_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE6 11016 bytes
SHA-256: 23af15a127459dd0ced399950ccddcd36b7bcaa496e0aad12f1304821960ed08
font_02_sfnt_off000134ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FF 17968 bytes
SHA-256: 071180f353cf10e38ea60ad52b4f8b81adcd3f41d82a9a464890d5ef36d3d5c0

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