Malicious PDF — malware analysis report

Static analysis result for SHA-256 d589e2e4e07016ca…

MALICIOUS

PDF

210.8 KB Created: 2021-08-10 10:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 01a7e8863abb67752bd9d14d36d26568 SHA-1: 1ceb23cfcd6dbdbe13c9616a62614e98d07873a9 SHA-256: d589e2e4e07016caaadf85b34a25b5615ce2796e574dc5a47a75c2ce60f0f3bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 5

  • 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.
  • 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://anandamsanyal.com/userfiles/file/lijebazodonage.pdf In PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099663d9bc0d---mufopirubawanajaxaponuj.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/tafajutu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c84a80313---27229018429.pdfIn PDF document text
    • http://mosjob.ru/images/file/99006350206.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1f18da282805fbe944d1277c9cfc930d/30873315806.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/38271370277.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/mifadivekagafod.pdfIn PDF document text
    • http://weingut-suppan.at/files/sesekinogonafo.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/qka2bk4il9gphff4qbfoo3hc7e/90242778532.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/28af2incltqtlko6kr7d67anqk/10874318739.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/zorigifalafevitavopota.pdfIn PDF document text
    • http://akademibt.com/resimler/files/zujufaliwafebuladevejufar.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/tagatojawodoluxominevu.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/2596795337.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vhl246s98hd83v3e71ibap7ek2/88910089540.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/7234978254.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/zajixatosimobovaniwevo.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/u5qm1ic80t4gs11tos3ph25pkj/galuson.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/34562016525.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b635de1ad---kimanuvedegiruri.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd9b96bbf5---dexolawesovorefekexomone.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/1280451829.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bc08c9d75---kamowenejowawidubenunode.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/b36gd8f06m3uqju3hp4guogk5h/didupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=after+20+years+comprehension+questionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2DF 17800 bytes
SHA-256: 141f0e7e7341999ea997bcb8c1423c9484b3d25b275fabb7ed3bb2785fc442e1
font_01_sfnt_off0002110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2110A 11280 bytes
SHA-256: 13cb9b2e69b4609c45b90d989a851eca7b7a058494b9407f2d784ce8b5057f74
font_02_sfnt_off00022b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B75 99872 bytes
SHA-256: 6848d134fbd3f815a0377da98301dfacc5514c2bb01777f47fc1501fa56a5a9c
font_03_sfnt_off00032406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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