Malicious PDF — malware analysis report

Static analysis result for SHA-256 100fa07d1e5aacd0…

MALICIOUS

PDF

70.6 KB Created: 2021-09-06 04:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58a45db9b1555622e18319d392e22024 SHA-1: ee842475b8fc0ddfd6917e2e43af6c464c26aafa SHA-256: 100fa07d1e5aacd05231cc38f3464b59c17a344d00b829c677f9fb8e6b8f8db0
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to malicious or deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

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://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/8399141927.pdf In PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6f5e5b8dd9b27cc73287aef0c4f5fe9/gawefuwaxumumabufobifidu.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/40930234718.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826f7c7fab4---rorawapujupekimefizoli.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/feaf16acef13bfbdba039e6854cd3f6e/sazavabudaf.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/nebimekewas.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff563d6116---walibinetufefuf.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/58634420993.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/07927b475baa21cd9b9856c28b6f899a/kerunepipusatagovelikeg.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/62865334803.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/dasebogaxil.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e453482889d---bakumolug.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/rojijinapalaju.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/f2711e46ab34d5b60671a63b0b9019ed/52948043707.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9pr3blbjs4ich8uhekcelcphr6/68144074456.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/nabupiwikule.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/wamut.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zepebigikatukafojurasagal.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bilapogajopigomodu.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/64810396953.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac73f82ddc0---57051609204.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/likeluxewubimumi.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/37926822602.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d3d82843aaa8c655155d04cdbfc719d4/vazasarenejed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mar+sheet+pdfPDF 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_off0000ce3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 10228 bytes
SHA-256: 20676d04f9f1459bab538ce0f609860405c9b24cd14697d138040f92bdf25a62
font_01_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 18060 bytes
SHA-256: 0e7ac76c614cbb5b55e7b6db6c829eb503b18f64a8e2505adff84847855af38e