Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2112297537a1a30…

MALICIOUS

PDF

87.1 KB Created: 2021-08-14 23:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7f72440d7e9b5f9a9540f9d7251247a SHA-1: 21612440125f84feeb7cd7fb28810698457d9b9b SHA-256: b2112297537a1a30dd4a35e6648c73153acb8249b6e6bb437653b6b004f3d712
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of multiple unknown URLs indicates a broad attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/vo8v9b2os5t10aadf8kdtnno6q/jabakozafalusilemafom.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7a4e021d307b01de9326564110d96957/95290207935.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/gdjjqhbi6flmurvaadi157ops1/95039229861.pdf
    • https://rm-parketi.si/uploads/90495019678.pdf
    • https://calmoinc.com/upload/editor/file/64634365583.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c38d3f479e0---62333055735.pdf
    • https://tortugafilms.ca/adminfiles/file/33078125546.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/26028b6bd407b7566ec2ad021f658db5/19554990082.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vikenuten.pdf
    • http://a-kamen.com/userfiles/file/fisebiteve.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942dd3e2f84---nikegizawu.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/63835782192.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4dd7d7f880c1a1f28af67ea37779d390/mufesipikemigovamiv.pdf
    • https://autosaloncenter.com/uploads/file/69008102894.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d56bfa9d0625c5e711ec8aec2d257769/tuzamononawejusixibuwikib.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba53bbdde6---71692846915.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b5e3bf9177a4478c74e94ad658d8e2d7/56108796686.pdf
    • http://limuzine.md/userfiles/file/3688740009.pdf
    • http://b-solutions.net/userfiles/file/17154286934.pdf
    • http://rcot.by/pics/files/5199502277.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/joxamafakezobavimuk.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe657797e03---fakoti.pdf
    • https://n-zvuk.ru/upload/file/62943313451.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce84d889a---97618295343.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=begrijpend+lezen+oefenen+groep+7+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f037.bin
f03e6886d37d4bd79831ae87e5e84db86f176facfc3a0abd7adc2fce5cc7eb97
pdf-font-stream PDF embedded font (sfnt) at offset 0xF037 10540 bytes
font_01_sfnt_off00010812.bin
377777f179528a39a7b43bc071a64efcbb9356e49a3fe70663f89d11e019d0d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 17832 bytes
font_02_sfnt_off0001351b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1351B 16792 bytes