Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b4fba8c15a007a…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 16:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b557bc81c82d6be3f595c84888d482e SHA-1: 284ccedfe1b3fa6c73a056825da87f2029be5586 SHA-256: e2b4fba8c15a007a259c981db2096ddcd1203493270561851a260a8467a879f0
176 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains an exploit. The 'SE_ENABLE_LURE' heuristic suggests the document instructs the user to enable content, a common tactic for malware droppers to bypass security measures. The presence of numerous links to compromised CMS upload storage and disposable hosting further supports a malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/gst37oia16u25uon163uqsqgnj/93506947366.pdf In PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/86266703186.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/nasuxulunomen.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ahrj3pj6rj10amoskv9p4bom33/gagiriwidizawunodozulez.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/241105466999.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d39d81ae49a---gubuxot.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/93790349648.pdfIn PDF document text
    • http://svx.su/ffile/file/nuregepanaregokegilut.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/93594815133.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c151b5a504---66202511691.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/kapopafurifawuwoponizeka.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82894976220.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c549cb0ba752152a68c68f5dd872b4da/pafexevosu.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0f4cc56---bolokod.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/lavafitazisofe.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624217065.pdfIn PDF document text
    • http://garderoba.sk/images/_file/85864081736.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/jexemamonepuworiba.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/74793487023.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/fovipituwavefaloroboje.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/1cctk9m8lbfitmpfr9ivt6fa39/josukides.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079416d25fa1---musejiwejimi.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/99021835882.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ij3m38eijmtsm6vej35tiv8b70/58934190149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=advanced+ms+excel+shortcut+keys+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_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 18532 bytes
SHA-256: 62251c7b62b725b13b2215a620e8cf6f1b1170c98aa8635a946cbf8dd1365174
font_01_sfnt_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 11248 bytes
SHA-256: 9fafda7a48ebe3d4898e0b8d05fe2b375d924740190952145bebe16727609c0d
font_02_sfnt_off000125db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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