Malicious PDF — malware analysis report

Static analysis result for SHA-256 e046db008f374a15…

MALICIOUS

PDF

87.4 KB Created: 2021-07-14 09:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53ce15bbff469132a393e72bc1281751 SHA-1: 9935150da2d76ab2c9269998749358dd73cfb91a SHA-256: e046db008f374a15ec86f3b67b029fe19fa78631b99e934f9b99be3ed84abe97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://huntic.ru/uplcv?utm_term=tristan+thompson+married+at+first+sight
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5761f93692---zusazigagovisulil.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091c3a714995---34442214000.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ub1t788s0mls5vgkikufjb8qnl/wiwurozanuvuxuraferaki.pdf
    • http://ahxxzx.com/userfiles/202105/file/bobisibozupexamot.pdf
    • http://businessvaluationapp.com//fck_files/file/voferi.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/2960e590da34cfa897edf23d1ba1c928/gegasozidajulazo.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/f704c6471dfd5bf2032128ebefd3f5c3/11071182046.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088510edffa6---14161139745.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ea8a4a82a---gosajipimamatagutu.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e02d5fa98---63127199316.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda2626cffa---nizemuxefumezaxanazo.pdf
    • https://bloomlight.pl/_bloom/file/97390339975.pdf
    • https://deepankarbasu.com/FCKeditor/file/fasepaxobezuwekuw.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/sduouve1e6splu4c1uu175knjn/70673067181.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5de982173---fitoxatimokakovexelitaf.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609075278919d---16036757713.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/733cab4fe9a87f5a5596ee5ec7afd4fa/serisejuxenukolokokukab.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h2mc16m4nogs5i0bss6qcled63/kovovupunutofumetozasew.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/9c011639acbc930f5cba7123f262b0a9/sifebuwamujesexikomukoma.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/da7861edf2de9ea3fa656e2cfffd1a8e/70926784279.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/lekavenejulubigatuwe.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/997526da0ff66ee99a4b54ff011fbee5/13152303513.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f245.bin
4cc3963a62e823c0ca38186840d6610736c5fa38340736e8c52a950d38be2b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 10860 bytes
font_01_sfnt_off00010af2.bin
b6f88092b0011e2ed17fc1fcea5ceee3115623110f25f2f0843068cd1aad2e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 17464 bytes
font_02_sfnt_off0001385d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1385D 16792 bytes

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