Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fde19e0dfdd6308…

MALICIOUS

PDF

102.2 KB Created: 2021-07-14 01:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea20aa0da84af83c8274e5e05e8f4683 SHA-1: 936ae0a63f3e74b04c45225d55db75aef9a3dc08 SHA-256: 2fde19e0dfdd6308ec3ead2ee42aee9e9a1d76037ba8174b98497729f17e00cd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfcb33b46d---97578134729.pdf In PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/3997795819.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/7400721729.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/mumatepinefogotatexa.pdfIn PDF document text
    • https://rosycaffe.com/file/259484658.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/gorefoliruve.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/sabavamasuvidotepanol.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5396befc31---34673313458.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/nutibugapenalaver.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/xibowumami.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/wipamomulazijalavop.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8156988880ce8605b7ca5e37f34262a1/vetedofigititizimesesoni.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f333f09175---walekaxagalinagokopapod.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/5062148599.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16232137461839366238.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/jokimaroj.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1bb89c9a7f7b060580ee2e413e58c43f/24829052882.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/38789701e8f1b562eff47722afec4d77/56387420993.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/075a5977eac4410bd59cefabd614cc5d/puvoxajixatetasinimepani.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf694bf3e---9392407284.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/wexobonurovil.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/vekikixaze.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/941d7f672ca645b78cd8356a5b1a5fe4/dokuwovugog.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/saxozabikagamewu.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/dkecn5au2gdodqa3eephcca2a3/jojixaxopesumel.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062721445373499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=concrete+operational+stage+of+cognitive+developmentPDF 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_off000129c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000141d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D9 11060 bytes
SHA-256: 2eadd5d32b996aaf183053009543b83bcc2e7f581b0a97d4eb7bf7622fbfd201
font_02_sfnt_off00015b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B70 17584 bytes
SHA-256: 8d30b16bb1c70e8c451107ae02ae7e8eba81e46baddd7cbd3e02ab4d4d737431