Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a75ef0e38a64aa0…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 00:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 84469695e1c042ccf03d707b90f59799 SHA-1: 53237c608e9cc6d6d3831d54cbeb92f29f4a3634 SHA-256: 1a75ef0e38a64aa052bdee944b5c0f132d96c90c80a3e727bc736d9a836e47bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://primaria-ciocirlia.ro/media/file/tazodalunovupozazisanifuk.pdf In PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/jipizagumukuxudesumezimig.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/ac8921e4da90fc85a655a1895479cdd3/bepafubaromerozereva.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/fumenezezowe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e57654e029---karepinujejevowimawoluxo.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/3b787eb6cb630d0188adfab20a10d7d0/tufazarukupida.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/dbhep8qpp1e6en18fltc6krgmj/furojoranitu.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/nixejo.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/93244352757.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/25257711885.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/sisesefogozevupajubateb.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/40465831589.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26aa21a1c0---kireruzugirabimax.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/dirigitomizujela.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacaeec765---norefoxowaw.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/20111210869.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/50768052720.pdfIn PDF document text
    • http://roocenter.ru/upload/file/muginoz.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16126ba8f9732c---70934810879.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e62a81af0346992fd78c03c6dca67b5e/ditawuvetamo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e29f74fb5---2386385972.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/olii4rhqhs5p1rm34cqq8ut157/mivif.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608747d0626c3---radorasabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=two+difference+between+exothermic+and+endothermic+reactionPDF 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_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10820 bytes
SHA-256: f3b3eb323185cf96d3bcc92e4c2e3a8bf8565a0c94ae96601b385a952cb0e3eb
font_02_sfnt_off00011477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 18880 bytes
SHA-256: 6f84ccbebb007d2518ed7bb1a13ec8c22e9fe89a117a269b69b7c087aea533d4

Open this report in the interactive analyzer, or submit your own file for analysis.