Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa7a75080a2d13a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-21 14:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87cb8fc7510426dde0c2832faa52e623 SHA-1: f156f6c6545be76def9049e7c9bec46e23bea5bd SHA-256: aaa7a75080a2d13a897692a9edfe5295cb3a6332b53c21f81c43a2e7efd4fd41
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to various websites, some of which appear to be compromised CMS uploads, with the apparent intent of luring users to download a game. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the document structure and embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.2081

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 http://electriccityusa.com/images/fck_uploads/file/jabenenutum.pdf In PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/sovezopuralodufozobidex.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109111338208130.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/pejajiroveruneloriridimil.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/56965915132.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/1c02300468e6460332db00549c733978/4117332271.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/db27d431f518d7e152f4619524a7cce1/lexudirana.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/45093348758.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/lubaxofimi.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/zovajuzebiseramamamezuko.pdfIn PDF document text
    • https://tkbhanna.com/ckfinder/userfiles/files/9836181086.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/tekulive.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4657917411.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/xalonofifobija.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/93116918138.pdfIn PDF document text
    • https://ivanamihic.com/files/pirad.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/61867457659.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/77668597810.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/39984260220.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210907200331.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613edf96805af---boxawomevurem.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf9f1d8770---52816228012.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/e3e4c82cf0c9c8c082bb04ab71ff1a44/fijutolubu.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/52918541518.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a6a2654ac73d948ef77d58d5322dce23/1965307813.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/pidefuv.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/43745672996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=gta+5+apk+download+gamePDF 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_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 10728 bytes
SHA-256: c870e180cf9b08741c96d7470fe829aca314970d44976937e1cf784ff4841fae