Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5e8aa718440c2f…

MALICIOUS

PDF

72.0 KB Created: 2021-07-16 12:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1263118483626e8c14e540addfe352c5 SHA-1: ea87e4c2900c05f9db4e756ae95a677c34e9393c SHA-256: 1e5e8aa718440c2fdbda2c97253d582d91cf6301ebc041552cf5e7bc3d074327
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to numerous compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The primary attack pattern involves directing users to potentially malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • 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.
  • 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://musikkursus.dk/userfiles/file/rufagonexitupokefisanajij.pdf In PDF document text
    • https://aduanaldelvalle.com/userfiles/file/46360210073.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a99c7149---18374538326.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/nuwixorumidapobugisoj.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609187cd3b0f2---40725982881.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b727070d4b0---92950908642.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/af56629c425cdf45d276adee4f148a5d/lasopumogegoperoba.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb34f0849b---xejilux.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/32247303317.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716d2f5e04e---magedovupuxoxedimigu.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/dabofa.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/wifiwoxazalasa.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb642f1efc---11188452638.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8f6120657e12e0908263b2efb77249d4/56248409352.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/ae74c02cee9e2bd740f8c95e4a0e1b6c/gokutotupebafit.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5a29666cb---49570758462.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/lawazigadupexufurufa.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/nibajavokixojisenobame.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/dewexun.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/mizimidozuzof.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f79fe2b3e---55143930597.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6067843b1e146226bc700c01c9920d99/pimukipaseletinajafe.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/vuzowaxemuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=lymphoma+and+difficulty+swallowingPDF 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_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 11092 bytes
SHA-256: bbb18cd02e1d4d00171923e7fddff27468c399d5c707725571108d70247050ee
font_01_sfnt_off00010653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1