Malicious PDF — malware analysis report

Static analysis result for SHA-256 254068704c48c15f…

MALICIOUS

PDF

79.5 KB Created: 2021-09-01 18:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ddeca0e2cd78abd76363f9e2076fa609 SHA-1: f56248b05cd7a124e78148fd4eaf352b5ecb3205 SHA-256: 254068704c48c15ff1d58b2ad24d55624d3777f386c9da14f0dd5ddefbb70db3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many pointing to compromised WordPress sites and IP addresses, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript (T1059.007) further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.weilandensemble.nl/ckfinder/userfiles/files/rolakibomina.pdf In PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/90924805179.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/nowasow.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/v9n6m2h03cp2uig9rk63n94sgb/wobutotafarufejebizu.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/lagexizikom.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/htnb3vkv2bbiffknu1bgdo96kj/38170416569.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/k4c56d95roo9r06cl4i6daku7l/wikalirupuz.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9a33f457---40101664414.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/95406243255.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/vabikup.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60ECABE3EEEAE.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/61577172703.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16075d38f228a8---89914619153.pdfPDF link annotation
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b13128f32ab---56953426656.pdfIn PDF document text
    • http://coffee33.ru/archive/file/29304178763.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/17551255606.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/nizepabidavow.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/19739822288.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/0sggucia8oj3rabuq2d275ekpa/34784546439.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e150238aa90138381cdd93336778e5e3/37338614485.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/357cf03d2443fdf7254f51a250666e29/jidumafepokipor.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/22887925817.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/33274395139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=should+cv+be+in+word+or+pdfPDF 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_off0000d269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 10756 bytes
SHA-256: 15c6f01de9b89d8aa57c5c3aa231bd2c58f176e760ebd6261a5ebdf20d3a0a4c
font_01_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 17064 bytes
SHA-256: 2a958e61d04bfaf0d3396048e6c6940fb2b8c40c932a0db0f0db0cdf5bd29dd4

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