Malicious PDF — malware analysis report

Static analysis result for SHA-256 7729202c6c059bbf…

MALICIOUS

PDF

89.4 KB Created: 2021-09-14 12:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 36d842e3849c20246420a8710489e7c0 SHA-1: f7a1c60b2d827041561d614a7d1e0d73c5e58a7c SHA-256: 7729202c6c059bbf9b7b312191408bf2cd1cdadcd8c731add4ea2ac712f4f823
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 compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the structure suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jk1kheb23djj77kgi1j61r1ekd/66996360933.pdf In PDF document text
    • http://iacsglobal.iacsinfo.org/content/uploads/files/79598020465.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/24bb04ec8a340ef27eb0f7f34d63241f/wagugugoxemibodivobal.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/90342388042.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea1467c57b---kurew.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/suvaseba.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/52677610366.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/33255355591.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef9319bb1b---vixavapipukedopolafako.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/wibow.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/pemutuvivirus.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/fuxoguripaniwotojob.pdfIn PDF document text
    • http://esistore.be/userfiles/file/72423820070.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/zarojoj.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/watuxunopuwipifaroped.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/dozavatusewetasimol.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/pufajisikinajus.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/digominunijisirobofefunu.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/40595836617.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/24544089968.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/01/14656442375.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/vojesewutokirogurug.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/41301366280.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/27699743079.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/subawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=power+electronics+solution+manual+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_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 10968 bytes
SHA-256: 47bc84405f9a50d2bdf715af78b96090b945b21d3a351c992833b19a01aaf7fd
font_01_sfnt_off000106a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 21788 bytes
SHA-256: f26d4b2c78562d14524024b0e5377c5ba5f9f46debc20426aa68597f9738645d

Open this report in the interactive analyzer, or submit your own file for analysis.