Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ddcb4136f514d1…

MALICIOUS

PDF

91.1 KB Created: 2021-09-01 15:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 60102ed8a96d975e68c57d8c4836b38a SHA-1: 6917d224feb95742f1a832323c2c32c75e336a5b SHA-256: f7ddcb4136f514d1b507db59f121e609d0862543ed8241c4c64c94257302ca88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pixomot.ru/uplcv?utm_term=rian+johnson+new+trilogy PDF link annotation
    • http://agataklimowska.pl/userfiles/file/95319949.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160728aef0b78a---dupevezelasaxiniwav.pdfIn PDF document text
    • http://jinyezi.cn/upload/nebagapumuvuk.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2f107898a---31712431937.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/18092696004.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/14305909410.pdfIn PDF document text
    • https://akbaturgame.com/calisma2/files/uploads/56870252780.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/4g46r29v5nvk1k191afh0jnaq0/47807333683.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/xajejozizedoniwirofolero.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/62008978752.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6ea705e9---5258282.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-08-12/images/files/23096769328.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/bigaka.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/34442cd25f4fc3238c76670d7a0e61c9/8963381996.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/xenivigesizujobivani.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/29119027018.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/1qoola9q7ifi2l8kdgerqq8ha4/xabupomoloxiseteto.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90b869db9b---27612067800.pdfIn PDF document text
    • http://hilltoplancers1975.com/clients/13753/File/bavog.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/86220533666.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bc7d68574---libidaxewejudon.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/zobagowapixowuvagew.pdfIn PDF document text
    • 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_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 10760 bytes
SHA-256: 938f765495bb618049e33706f1f39de462d0c188154bc03ee93ca389f105e4f9
font_01_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 18360 bytes
SHA-256: e66286309648385fafa0a8a2996abaa9dd3d29caebc0ec7e59fecbe472e5c0b2
font_02_sfnt_off0001471c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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