Malicious PDF — malware analysis report

Static analysis result for SHA-256 e960269ca358056f…

MALICIOUS

PDF

102.2 KB Created: 2021-09-10 16:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9ea49973bec4025a8f5566ea3482fa10 SHA-1: fdf845e743e0cde7ed8cb515575a4cc7f3b7adea SHA-256: e960269ca358056fdfea27f9c7e757adeb60570ee84c321b8a38f28c9ca49026
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to download and execute malicious payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs suggest a phishing or malware distribution scheme. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sanmuabancongty.vn/images/content/files/18125586553.pdf In PDF document text
    • https://argumentua.com/i/file/29567270670.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/56704578884.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/pizaxakopoz.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/wexexajifi.pdfIn PDF document text
    • http://allier-genealogie.org/File:/21269488954.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/98532021980.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/3794702628.pdfIn PDF document text
    • http://apismorava.eu/docs/xisofebabozab.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/87142368733.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1a7cfc3f997795e70856b34275bf0e2a/lorotirazubo.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/32519894329.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/11482247122.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/k1p6n0bs7cj219ahmqv84msr6e/saxijilepavimo.pdfIn PDF document text
    • http://baoveantam.org/upload/files/fimemagejofadafepi.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/45441210625.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/7012485797.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/fewalepikexesufujokiti.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/faluvik.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/fiwuw.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/85385780447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=chal+mera+putt+2+720p+movie+downloadPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/vaxapejuxef.pdfIn PDF document text
    • 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_off000124a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A2 20020 bytes
SHA-256: f64d997718cc1b7970acb9b6ba607864be586f14bc9c34a030c8a18dc14d5d9b
font_01_sfnt_off00015944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15944 11064 bytes
SHA-256: 9e77d59e45f9b119ab37fca2ba84ce2c4be2279c7c9296fd29047da64400a560
font_02_sfnt_off000172f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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