Malicious PDF — malware analysis report

Static analysis result for SHA-256 7459a0d4efc4688b…

MALICIOUS

PDF

78.1 KB Created: 2021-07-04 06:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0cd275e1c965fba7fa77c22b9b15a6c8 SHA-1: 3e2b3b6a6a04dd765f1544e1d5b534c087b5b9b3 SHA-256: 7459a0d4efc4688b8dbae55f1408a1c9c290ac0fe459d19b09aa0f9b097568a0
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojan distribution intent. The file's structure and the nature of the URLs indicate it's designed to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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://iword.de/userfiles/file/wuraxagevizolipu.pdf In PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/donazupilepeki.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160839af8e1e14---36783320905.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/nafemalawebobo.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a196df7eb69a9f833ed5e52ddc1c5412/vutimosogetilabigamujuv.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/24ddd2af81e80686427e71a3bc8d1bc5/javenijuviguvol.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/5240628919.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e1385107---welox.pdfIn PDF document text
    • http://come2menorca.com/images/file/mabitedaxizuja.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/63214574151.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1904ab38a8cd5ab99768f77185fb5c41/1778724626.pdfIn PDF document text
    • http://qca.ch/userfiles/file/pinabajejejizavamuderusoj.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/f674ne3o1milun20c165nokjsd/nalubasonisadumobeguweg.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a9c4867888ba2f58c8965deb340f7cd/nagizunag.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/b2ntvim4ee3audf06apqclqbl2/lukadukefopidal.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/21593531865.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/87932705176.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload//file/gumew.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/75453861083.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/34784503138.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c6b3f667---62889572097.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/70830146029.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/5467441257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=tumbled+green+goldstone+meaningPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2b989a7c7---53096741761.pdfIn PDF document text
    • 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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 10792 bytes
SHA-256: de8bb4c041fd12ce6ffa06058fcd0cd6903405b5e73751704da0dbb952439f7d
font_01_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 17344 bytes
SHA-256: 10383cb78ab13fddc0134eb0fd70da38313cb60d51f028c11d352783227be0fc