Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cc141b413e50ef…

MALICIOUS

PDF

87.8 KB Created: 2021-06-27 04:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 283747f3b14a0a504d12b4ade03b3bde SHA-1: b649c78d64302b2ab4babf94d87a79290785b089 SHA-256: 93cc141b413e50ef76895641de231c1b3dea395810c79aa577927ff7c8bcd449
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and numerous external links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/eekbge6rnh43i25hfsefsd8h18/54534843290.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/95d87349781408d7b73168385a341b14/75047034707.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/9b39dd95c6165aaa190a0f3fdc4b255a/xapozepilipujupej.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jmfvpp543nmg9opo7rg5s5u1kd/79898793234.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b22c5121e2808b57db1bab6290555e4d/40057984433.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/qfhbbgnhjqkq13nkg2qg4pepm0/xojava.pdf
    • http://akcjonariusz.com/UserFiles/file/zesutagusujexikatiwi.pdf
    • http://dancephoto.ru/userfiles/files/60879526372.pdf
    • https://activepymes.com/pub/file/61842877536.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfdf777271---kujazamole.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b129447d67---31023042489.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f840fdb445b6b8e41efbbf3d5099dfc1/76774816961.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fce023ec5---litilivisi.pdf
    • https://capecoralliving.com/media/file/85045480509.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b3f84361e---93790803712.pdf
    • http://drapa-technika.cz/UserFiles/File/gotudonafi.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/54c067c3b7c7cac56450951d8a553b9c/duzegejobera.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/jnkl6k9lfg90l3nil58prn5d10/58522694682.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0291272567---50816254870.pdf
    • https://acronimocostanzo.com/userfiles/file/ravirifazoregeworobud.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/miradekiwozewane.pdf
    • http://kolasinprevoz.rs/slike/files/24172952220.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b1425a334---lixonon.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/135b711ceb9cbb8dc0f654fdcaca7e7c/27401550717.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/58bb8f8255c328939a85faa8f6dc0174/78322205821.pdf
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/vatabubivajodemel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+are+the+4+energy+transfers
    • 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_off0000f263.bin
1f97479b0c0f59b1f91f0daf632b70c5110944d1656aa28eca9793c4371aa83f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 17572 bytes
font_01_sfnt_off0001206a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 16792 bytes
font_02_sfnt_off00013881.bin
a6540fece3d99786fd5b1a278a5a894240a41482e914162a127d4cf847aadf30
pdf-font-stream PDF embedded font (sfnt) at offset 0x13881 10420 bytes