Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c6e0568ec35e66…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 21:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1730bae30274cdaea6ca6bc3046a6728 SHA-1: 81269fdfd9fce6e642c55f4939598953535373cb SHA-256: e2c6e0568ec35e66a41ae8a3703b432bc48b40fd57d43404f6f4ad8bb006672c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a multi-stage attack designed to distribute malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094b124c038d---jugutelixujaxowupiwu.pdf In PDF document text
    • http://mlsy.cz/images/file/files/rezikazud.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080864419555---dafoxi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c351a4b007b---24702196277.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076445c39a56---mejakeve.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/funifuruzolakofawega.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/zetevusosixib.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/bedef10198387e18da4c0d744c0e8ee4/96126964302.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/78af3e5966fac99e55bfe2e5f353926b/61004966970.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/podin.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210613_76F67A89EF599D77.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d441a4c6a02---72514246341.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16096f960eff8d---gedudemu.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/tuwoku.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/10b776c443fb3e5075c26440c5c2e1c5/lafelorelebivunutevidozin.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/solovezokonovur.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/51695764234.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/2788195619.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/52521485784.pdfIn PDF document text
    • https://magerp.org/upload/files/33941879995.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/lifejepowutes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=triphasic+training+book+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 10916 bytes
SHA-256: 66544bf8b5d43dc213d36813c2a7d0ed933a3bb8a82d6c47927ac32c1c6d7605
font_02_sfnt_off0001134d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134D 18400 bytes
SHA-256: 1c47c659c702926271c106946739f25d4c09d26213ddab888d010930b23b2bf9

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