Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d8a2a2999a7a59…

MALICIOUS

PDF

80.9 KB Created: 2021-07-25 18:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e6b09c74defb5b1075d5c1a80bb9c22 SHA-1: 74ff9289e9b5131f969b2bf87de80e97f9563037 SHA-256: f9d8a2a2999a7a5913832c01e7ae79893a5aa7087c828410f396fcf08c301cbe
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These link farms likely serve as a distribution mechanism for phishing content or further malware. The presence of these link farms and the ClamAV detection strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

Heuristics 5

  • 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
  • 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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8afa968df88aff44dda58b795f5d78ee/55730580142.pdf In PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/02141fb62d721b2292004b73be604740/wakeda.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/69189520198.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/1694648619.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b12fffffc5f880c8b83a91d56d96305d/29998090259.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079084515d57---51038447070.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/n69198e8prflln3jfa3mi8fta4/dudubokesewov.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd940f2898---12179107768.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/9e8d4dd45248d93b9ef03ebc1e78c1d0/perovite.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/jusuzexefupuzenudiwuvove.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/fupemezijebulaxuda.pdfIn PDF document text
    • http://attlas.center/userfiles/file/54336338925.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/burasir.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/nirumiwamivug.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3e50cae9---gedaxoxofovemaxopuzovozi.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/eeb406bdb220eadb543fe4d87eefbd94/35212041834.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcec316da5---62662250940.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/44219625117.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094990b79349---fijaturulapukefo.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/s5th17d65fei78pa8fenttbms1/kaxebi.pdfIn PDF document text
    • http://agrion.org/upload/fichier/vapawidudupe.pdfIn PDF document text
    • https://proxus.nl/file/wuxalisezexesi.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/40992326521.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/45253512744.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/gebitugenarik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=can+a+family+friend+write+a+letter+of+recommendationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 16752 bytes
SHA-256: 35744998c9fa11e87e908dc30b4bff7687e7ca8b53add3fa719a00f8ab5e962b