Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a3c6099b0df97b…

MALICIOUS

PDF

99.7 KB Created: 2021-06-26 14:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a63f8e3fbe86117c6fc0502105a24e74 SHA-1: 4f463311ae8d3d38d92f713ada0f4ca5f61d529a SHA-256: 60a3c6099b0df97bca57e005c0b64f5eca0907b9a5a767b6fb28ebc71452ce59
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings clearly point to malicious link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.radanhorse.com/resource/files/figuzowudaxinexes.pdf
    • http://sportsgarten.com/editorData/file/39570230805.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/dsismqphi03794gqiv9fbsiuob/mataligone.pdf
    • http://brcassociati.com/userfiles/files/zukeligat.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/7d0cc55b4c90e798abfa38b6e9514828/17713243238.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/hnir8d1trkntrhl36u2praeict/sanewuri.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b7274cb5a620ed27bcfa336b5a4750eb/zitivi.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63f076ed24444ed273471cc44f84de1c/noviwubudujinitoxox.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/dc9c93aba49e9f545d9196003edb3088/mabasuf.pdf
    • https://motelandratecuci.ro/userfiles/file/robexabotujurogizar.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160780ba179791---89645030004.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b941e5481d9---rularojixakajezulanetetuw.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160beb20b71941---dotowewetowarilekomedepa.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6ccdbf3bff39c3c97ccb1d086021c921/bovutunogupasupimekobati.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ei1quv2t1056q3hbu9l709tnha/zizitamiki.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608156c5101ec---totokipuvupebutamuzisem.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/wabamoladerojibew.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16094234663ff5---zelixul.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/59734705878.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8555004f4e---fegewug.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c69245209d---95655029568.pdf
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/wuniwotidapezip.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887d080f0c4---73574439827.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/66bgpnus59ifcqppi118ec7c6g/nozewez.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846709e8871---kuxexebekapukege.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=state+of+fear+summary
    • 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_off000122e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 16792 bytes
font_01_sfnt_off00013af2.bin
5dbb2a6ef035cd7fd0c1520ad2dce79cbe63e3105680c7b26b896084c08fd773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF2 17468 bytes
font_02_sfnt_off0001683c.bin
509b9c105db23da7293852a83743b0e073c18d9046eb36091bd4ec267778d6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1683C 10420 bytes

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