Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae84ec79f0a1efba…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 10:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e3c93c8d7d8a6377a44a14e76c08de6 SHA-1: bd712d35f18b9fcfbd536e5d14b2a1dbc52b7b92 SHA-256: ae84ec79f0a1efba3abe747a1be0c7d79b780f855daf13a9e2331e600244f6e7
96 Risk Score

Malware Insights

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

The ML classifier strongly indicates maliciousness, and the PDF contains a link farm pointing to compromised WordPress upload directories. These links likely lead to further malicious documents or exploit kits, suggesting a campaign aimed at distributing malware or conducting phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/84db1c7775e1b2a2de16adbba6100cb5/75959595697.pdf In PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e52a835d9d---72045839444.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/33678294170.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa386cd716---juninazul.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fizenadugula.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/tigeraduwaronolakilanewaz.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/pituzunumonowazizulana.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b673cd7fb---gixiwuk.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105fd304ed27---pilivolijopeboseferete.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e5fb84717071256af1f452cf8bb31097/11474331516.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/90142332029.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/74956403910.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/jogovowifanukuneniw.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780ba3b0d8d---wepudimagemume.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/fusezejonano.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/9gcvb0r3jht5i91614e82fl2js/korinixilopilugawipek.pdfIn PDF document text
    • http://domainecomps.com/documents/files/fujibon.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b476d6af894975c45c668a280008ed67/7667415516.pdfIn PDF document text
    • https://sbufficio.it/file/jefokulafotapeze.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/gegexozas.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9182598879---14421064128.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e1d751a17f83c93bd782f5434982a831/1535534312.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gafizipup.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/82815234080.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/dutaxilawupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+most+worshipful+grand+lodgePDF 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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 11096 bytes
SHA-256: eaabdde3682dfa04119b6304bf0db6873399efce76a67929abd826caecc0d734
font_01_sfnt_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 18316 bytes
SHA-256: b0d89c14b977032b79e8e5b74606120bc60efa59c8d17c4e01109f3780951b1e
font_02_sfnt_off00013394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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