Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0527cba3e2c3f1…

MALICIOUS

PDF

92.0 KB Created: 2021-06-29 21:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f2b8d7182bb3dfe6fa6c9f19e678e7a0 SHA-1: 1dee43c0f3189bcb5fc1b6a7e29c9d345603538b SHA-256: 7f0527cba3e2c3f1031ad0a7d2045dd26d77ea172353f4c5a56b8ebb65a16d45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites. These links likely serve as lures for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • 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
  • 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://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/nexapopuloged.pdf In PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/fe71d46773ff65e7ba10071492e52448/xikatavipozigodazuwow.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/29907917822.pdfIn PDF document text
    • http://sunnyvale.com/wysiwygfiles/file/72403721907.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/a5ek6af82hbknm88d1nknqqel2/7347549313.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b4ce1f524d789293908d55fb119afbe4/wamemeraforu.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/pivowevasinog.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/81402904594.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/zumuzixubogupexedemekobi.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/lokip.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160886e16d6be8---39428527267.pdfIn PDF document text
    • http://princeverma.in/uploads/files/tasiladeri.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/nimdv6lmem4qo1u2u5f8h2uqb8/bowobifegufe.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fdee6e89a39c6cd3078fdf90ef9a8cd/luzozekeb.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/gerogosenuvegexaxekusale.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/ml5nbq4irihrm08cplk56ej0v6/lapaxixunopobuduligupi.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/murek.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/vawitojezuxaxoliwafeduf.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/suzubolatudalawanosu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/dusunuwedelibokinoxoza.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adc73454a---58224538272.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8c8d78667---30840508059.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/65la2r9hbsm37g1us6e0cjm0t2/xofimojujafikotaw.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/4d77023cddcae9e3be9e4eb325a9a581/jifurulanevejaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=extra+electrical+pathway+in+the+heartPDF 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_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 17096 bytes
SHA-256: 746751f3b1506aa155298bcc32d042fae31d332a9cfee39c3a67f08c98c9b3ef
font_02_sfnt_off00014b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1E 10468 bytes
SHA-256: 7b9d318b783d963d0f095b48b3a4bbbfa388d5a9fbe716f3419bb9d0a474114c

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