Malicious PDF — malware analysis report

Static analysis result for SHA-256 460f14df6d019f8d…

MALICIOUS

PDF

79.0 KB Created: 2021-09-04 07:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6674e640be7eb21a9f298f60b314b86d SHA-1: 24e5157d7a4a8b18f6b3f3c01c06963cf3d47462 SHA-256: 460f14df6d019f8d5078ca210e6ce4b0c5c3d145f57a2fc27b0e55dd3ac5e0b7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs hosted on potentially compromised infrastructure indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3ef071c5f---64057543375.pdf In PDF document text
    • http://specimport.by/files/files/guluxunanosovazopuma.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/3a84153400742d420bdb1f7dc185069e/82227534032.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/xosigurijikel.pdfIn PDF document text
    • http://eko-uklid.com/files/file/xurufofixibelosatenorog.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/69ccf1858a3d9bdcfeeddc8d779b0531/deviso.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ginilepopaluwile.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/94feba17270c2b0e09db8fc1180fccd7/fonanenonelefubuvedofonu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1d764eb4d---sererodofukigufex.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/86186829095.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/47269721867.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160713cacd78b9---jitugel.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/51307390090.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/68862924743.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c799b495a99---nugolewetoledi.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/liduzadapolodulames.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/tinuwun.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613062ccd11a6---41196283933.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/danitizaze.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec9edccabe---budatojuterenekuvisuvikod.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/29345d9165ef2744f9d444e77a6039b6/bizowifez.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/kilularokujowedato.pdfIn PDF document text
    • http://www.bash.cl/media/file/63902232496.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/mazowetoregojuwopiguz.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611f9921bab39---51459564643.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/198c52eda804e4ef11ff1cc3835a16a8/71381289299.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=diktate+klasse+7+pdfPDF 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_off0000ccfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 10312 bytes
SHA-256: 0c2a5abc9e3005c8022396b6bca6a945476f3127ff72fafdfba032d76f4e0ff8
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 19296 bytes
SHA-256: 3283f4d8f091cae042f9aa2160616b3961e7f9a4f65f1b338f54cb3aecfcb504
font_02_sfnt_off000115df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1