Malicious PDF — malware analysis report

Static analysis result for SHA-256 2946db4006d7a50b…

MALICIOUS

PDF

295.8 KB Created: 2021-08-06 00:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 891e30e4aea9a205ee676e2591092747 SHA-1: 3680824c87fc43733c0f247130f94f4ea51223fc SHA-256: 2946db4006d7a50bffad2444da5cf33eeabb5524ebfb712d76a702ee2ed2109e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The presence of a PDF link farm and the ML classifier's high confidence score indicate a malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hitpoint.tw/userfiles/file/2787205356.pdf In PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/40760976061.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/xegomebunoj.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/d8841a8979a9c010ba295dfaf42e53c3/suzudavab.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/jadeziloribenufare.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/kitodurijedo.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/81481454828.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/midevutipaw.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/40009122530.pdfIn PDF document text
    • http://atek-ent.com/upload/file/10778835979.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/66905843870.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12b2158d41---pititakumi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610c52258b119---zofovumiti.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/19990389232.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/libominisejuvoperedumofa.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/58163913520.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/gexagubolodejijumubajeda.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/13ea16d7d2a0e255cbd8713481c706fe/80796454544.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b536c68990---fuvid.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/32994938562.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609669b875f8a---ruranonubofitid.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/fc09d9bbecba9a74fa39f6e336d5a988/18953581330.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/e7tm5qm98vgbri2v652ebdlnn6/gosunomezeniwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=diagnostic+radiology+lab+answer+sheet+patient+18aPDF 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_off00042f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42F90 17496 bytes
SHA-256: f18b83f5ede25e5ae36f17ae7e26af9b2ff730a46b200f6be93b00f0e9ddfa98
font_01_sfnt_off00045d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D91 11396 bytes
SHA-256: 5ad1e1d296638812a7d5cbab289f96a4912d6e8fdb1ef9eba269301cde297509
font_02_sfnt_off00047817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47817 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1