Malicious PDF — malware analysis report

Static analysis result for SHA-256 333ad1c900bc1d49…

MALICIOUS

PDF

104.7 KB Created: 2021-06-30 06:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ea5a752449d53775c67139abf5f40bc SHA-1: de195085ddac419d9df9174a21870ceead4da955 SHA-256: 333ad1c900bc1d4961c7e005a4312caad97ea2e65355e8a5d2cc220ac10b7b06
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to various websites hosted on compromised CMS uploads and disposable domains. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1875e0495dfeba77137dddae6e1451b5/2135129856.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d6fe6b20f232209bbc9afd2ee5ec5acb/polujasabitulemeniputalez.pdf
    • https://waroproject.com/file/bonunijimikizinidis.pdf
    • https://hkbca.org/UploadFiles/file/20210618155428139.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9488d7dd939d866ded51e8a15b1f01e9/85148842437.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078843d45426---98168247929.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b466eca962f---10725812768.pdf
    • http://bawaconstructions.com/editorData/file/resekaraxavetuzun.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1df1420422---2217444698.pdf
    • http://sahamit.net/userfiles/file/64334642082.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c29ad9e58bf6849888ad033958429d87/sanebupomem.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1lodd71dulh97uuibrm6jrv7s6/76586337937.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/4a62267d9e85245adc91dd074dc5d4aa/36897118480.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ca4a6740c---lapipugapotola.pdf
    • http://axwelindia.com/uploads/5588205902.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/30f72a5cbdd8eff94f7f8547a4200bb2/siwozelezasilomo.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/5e1db3910e68f6747138e8421c300013/rodug.pdf
    • http://mispuntossaga.com/campannas/file/66163719796.pdf
    • http://studiotecnicomartani.eu/userfiles/files/wosoxukapatamuvepig.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc6d34f192---54985962864.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bee+sting+in+lip+swelling
    • 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_off00013a06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A06 16792 bytes
font_01_sfnt_off00015218.bin
77dabdbcb4fd9ee7b78134fe23b1ee63415ec253c5b2a50f333a300ffac83bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x15218 17328 bytes
font_02_sfnt_off00017f20.bin
ae0ea94e4ef0b7fe95d295f5ca2f6199179a6f6aa1977cf5b83d67c312b97ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F20 10184 bytes