Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc499ca6f097bdf…

MALICIOUS

PDF

91.7 KB Created: 2021-09-01 06:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b65a1ccf6be6d33ef253e75b211493a SHA-1: e14b86b86b0dad5b18fddc465f23666ad8194a36 SHA-256: 1dc499ca6f097bdf1a6de8a2238ad05e9ee3c7da381897b6eb77f9ec406522b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f111dd5a---fopuzazozobatax.pdf In PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/716d775a533c8d3a4f5e23d5e13990b3/monib.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/35539734701.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b236f37a419---mamukinapipaxukik.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/panek.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48e50b6c75---55259601427.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d984817502---zituginebizeronados.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/23961457740.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/39746934272.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/68209272124.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/21910559093.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b09631a7645---20582478785.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/2qopb1hi64db3u8m1n458u654k/15167160847.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/lilujemigazete.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/moresumepowo.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c31875a70---zorezakazijiwome.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd714d1a67---vositarumusi.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/723a18baf785154dae743230c457e7ab/43381584118.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/tebemutitumikirivevaxubo.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210704_165220.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/298006903.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/junotemofopoxaniv.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab08a4efb8---pofewotilazuxoxutemizoro.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610991b110afe---fivugupobipuxuzaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sarcoma+in+mouthPDF 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_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 18380 bytes
SHA-256: 94fdb5381db18a70a8bde7b6d65f786494b33e79ffe369324acf9054168c5b7f
font_01_sfnt_off000131ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BA 10324 bytes
SHA-256: 9f04da3cba923fce5d8d111a93dffd7c2e104368ced6e2702fa571a5f6864d9d
font_02_sfnt_off000148cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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