Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fb4fc318203568…

MALICIOUS

PDF

83.4 KB Created: 2021-07-05 11:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a883eae2f70e7c7b69ee3e74b469ee4 SHA-1: 937dd6e8bce5ef75096362caafe8a08a66000f39 SHA-256: 00fb4fc318203568367e4b78c5bc13ba113bd053a4284f785877b90c23f6c13f
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, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to lure users to malicious sites. The embedded URLs and the nature of the hosting suggest an attempt to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/tobenokawuvubeximotizus.pdf In PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289b6ca49b---11564380101.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc3d113fb---35287103312.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/6570627391.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b02ecb7c120---92485341839.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/71944849647.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbff97cd0---sidomuvesox.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/47b93ad92fd22bbead95b2c7b30b6b90/jazelijexuk.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2657b12efd---jafowozodoporanejoda.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/323888c92394ece2f77a0f7fa089ddd4/tirewobufepitux.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba1019178---nivukazuzafijon.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b5e618e31684b83fe4ec6542ce28e086/verig.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab64eccdb13---64048129981.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/76127706774.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/82362817597.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/1970081b6b88e0d3ba0cb2d3639ea98e/17276425017.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/e5op2s874o28c65o39aauud41l/seropofuzuw.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b28173025df---156768459.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaa9827bf9---48037578473.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/67695f4aba53d9e63a8afe38487c4d5c/79415980890.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/fulokemikodoxelil.pdfIn PDF document text
    • http://candientushinko.com/images/file/sekax.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5a06735ecde7fbdde94aae7664b41753/kurulajanij.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/rigimibutejelikumijavivob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=thick+girls+in+pantyhosePDF 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_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 10824 bytes
SHA-256: 60973407837305c5e8c1ba020fb5b64a3ac11d1229a631569c04f3e906eb5d36
font_01_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 16744 bytes
SHA-256: 1ef2efae9554a24c5680b5955370464e643f9f2914994655c69939f0456d74c4
font_02_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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