Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f046fe508952149…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 03:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3360e3746cc4fc04e40f311f289cd4f0 SHA-1: d98ac000909d9fc76bc7416a65f1e6bbded227b3 SHA-256: 7f046fe508952149e775e8df7624adc87f377f9bf85bb9118eaa0f0f0f50f41a
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution through these links. The use of 'utm_term' in some URLs suggests an attempt to track user engagement with potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6055

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://wastran.ru/uplcv?utm_term=adb+sideload+mode PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/454ii0s879lqh0e13g79hvcc4o/55740281577.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1632329514.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/jikoderi.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/fobitokuwoniwaz.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/xovidapedixinofurubiga.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/qrqpv5u6l72gsdrq29np8gfh73/51891136358.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/veragotuburazum.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385e0c651b3---retimizojirujefokifawekur.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/zimoxabiworivezekabazila.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/rotorevat.pdfIn PDF document text
    • http://ewtch.com/upload/files/rifapo.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/40896bcd1e14d7f4915441b401994bd1/lipabibumomudubusid.pdfIn PDF document text
    • http://groupkaishan.com/d/files/858987479.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/jowakenisokovawiziludopid.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/jorenimelunedijavabusif.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371dba59eb3---39387075914.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/22d484fcc9b78da6b91b56e4bd9a8c71/68343222170.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/15307721765.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614211370dd9f---fedevakimugad.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/5612230930.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/wepurawowowafu.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_off0000c8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CF 10228 bytes
SHA-256: 0cbae9505ebc419c403520bd60363455279725be858b3d85926608f589d9e936
font_01_sfnt_off0000dfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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