Malicious PDF — malware analysis report

Static analysis result for SHA-256 294274fcc7fe9c6f…

MALICIOUS

PDF

106.3 KB Created: 2021-06-26 05:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3fc10ff1b766a98e3cea5c6b0b8adac7 SHA-1: 0f9dd4cfdf280b70d7084506333f750d406ba326 SHA-256: 294274fcc7fe9c6f94fe1e2c51f35ee714579fee925c78ade8ed5700f2ddf549
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's used to host or distribute further malicious content. The presence of numerous unknown URLs hosted on various domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/85pham3k7jltjsos4n6mmagq87/lajotumigefunatexolu.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f49398608---99584396704.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/23033373715.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/2kpblqroh2uf9b8vsirc55qg64/nujigidibuxekogamiz.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073319514113---23603901700.pdfIn PDF document text
    • http://93564497.com/userfiles/dulovovitavalubalimubaxi.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/vuzunu.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9c9c96d5---85128301065.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a227335d074---muvisoju.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16070db8c04577---92487520277.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/midarukunazeruxefuvido.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086f795d5960---nivinabomuvufedulejid.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/88008943287.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8f287374b---24132450903.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/tuzixixegabedi.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd14f61c3d---jiwovuginewuzasewapizulum.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b0bbbe56f811dafcffec046804d0e067/zolegofa.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/73751366782.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736bd8d54bd---73998883862.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e25b79573---wugovizebuj.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106051025452730.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/sekebekelezesol.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160917cd4687a7---41963057888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=good+comes+to+those+who+waitPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 17908 bytes
SHA-256: 5752328790cd702120a9049413e1cef9a8d0c0d811cb44ea517b8cc1b0fb242d
font_01_sfnt_off0001202e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001383c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383C 26512 bytes
SHA-256: f155d38148cd8a91962ada3e30d62a82be3912d4d1dca3eeb9e16eb0338ca3c7
font_03_sfnt_off0001817a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1817A 10512 bytes
SHA-256: 40081fca9f88aa4f36853cd85854239d8445a012ec6734ba636f422add630295

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