Malicious PDF — malware analysis report

Static analysis result for SHA-256 865e14d94116c87b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-19 11:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9dc6455f1b2387aa4635cac3d1d2f24 SHA-1: 07e77163b1f5a6035c118fd4f7158d6c54f99ba3 SHA-256: 865e14d94116c87bdee1bb352d523284769c1aa27bf6b95a6201879ba0d9cb5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and utilizing UTM parameters, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure itself is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=tv+ofline+android
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b5fa884d1aaf772cf585a49239966bd0/80107721362.pdf
    • http://alacartedesign.de/userfiles/file/nejogejugozuve.pdf
    • http://mbeautyconcept.com/upload/content_images/file/6170915070.pdf
    • https://chongtham68.com/app/webroot/uploads/files/26060633015.pdf
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/fizevoxafutimaxamuxip.pdf
    • http://ibookingkr.com/FileData/ckfinder/files/20210919_AA0503A9263A24A4.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6e9045638f9b6bf06f07173903ac4bbb/mexelofawokusiloderixejiw.pdf
    • http://nscenter.cn/upload/files/57819223192.pdf
    • http://phuongdonggolf.vn/app/webroot/uploads/files/sipotezeganinadoxemewowaj.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131015feba9a---wububabusu.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613838d539b5e---7688107869.pdf
    • http://shoreluxurylimos.com/userfiles/files/44797842802.pdf
    • http://irinabailey.com/upload/files/29512360589.pdf
    • https://samirkumarpaul.com/ckfinder/userfiles/files/merob.pdf
    • http://edv-denk.com/userfiles/file/2104711176.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/2763029418.pdf
    • http://khonggianxua.samdigroup.vn/app/webroot/upload/files/dagiwakupo.pdf
    • https://jasmijnbloemengroen.nl/userfiles/file/33383530023.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diruvitulurem.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/cfa0dd925edaf70f38572f90383b9934/73440313173.pdf
    • https://lacgl.org/upload/editor/file/8364098849.pdf
    • https://journeywithmypet.com/ckfinder/userfiles/files/29603255690.pdf
    • http://janjoling.com/public/ckfinder/userfiles/files/zimixuwerewakofibelagu.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0a7504b66---44956319027.pdf
    • https://zifu-tech.com/app/webroot/userfiles/files/13491056776.pdf
    • http://www.szphotar.com/admin/img/files/nuvaxibofiwalod.pdf
    • 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_off0000db02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 16792 bytes
font_01_sfnt_off0000f314.bin
dda9b53f89b43e3630f72fc86cc8beb9c856f65b45fafd99760edf8d7ff92248
pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 17440 bytes
font_02_sfnt_off000120a5.bin
3f31282ca4f009528d34f1c07fa13cdd82983b8bb00eddb9ed4093e229f2e743
pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 10108 bytes