Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30e415f6e16ea3f…

MALICIOUS

PDF

108.7 KB Created: 2021-07-21 22:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5c90498752d25229aa4d62e675a00585 SHA-1: 64775d636143ddad88a70dae19e83e3187f6e372 SHA-256: b30e415f6e16ea3f4042cf3e07a10cf49c8a28002ee65b8f8f30201c1f65b4dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous websites, with several links hosted on compromised CMS platforms. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests an attempt to redirect users to potentially harmful sites or manipulate search engine rankings. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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.sport-konyv.hu/userfiles/file/80277026998.pdf In PDF document text
    • https://securityguardsupply.com/php/uploads/file/bosagawozegib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8c2296664---rupapufu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/92e696a0702776572c23ddaf60e66666/2958884957.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/wevelesovelidagirerilevi.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/e9c61e2a1b089f9ffb3c63db8b75a9e2/winifepoparafivanaduwib.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/8ianqgiu573ks516jni4uj6io1/rutedojifejefozesob.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bee49c6a0ab---50106177778.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/14141803848.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b18bb6d3b---46839329615.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc04c74296---dafadilefilefuwatajulol.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f1fbd039a---vanomawepike.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/safilabomobopi.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a167552c3---fewisapipudisuxogijaxesid.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-3/20210603163814491331.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/gideru.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210618001339_409efe.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0c02147b9---sobukawinakega.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fawedisinofa.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/92095910641.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608019335f0a1---rofigoxiz.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/vmgvud8hc5uqgjn4gpca971iij/pewir.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kuvubiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=numerology+meaning+in+marathiPDF 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_off00014ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB4 16684 bytes
SHA-256: c2f80a7ece32b566a680312c902b1a7c8b50cc35819c55c6d1b7510e36e64bfa
font_01_sfnt_off00017549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D60 10580 bytes
SHA-256: 08652c6b712eeea8f12eb2be5de69f4f24cd0e60fc940f34c10ae10e5e920dd0

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