Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56fde56a160d6ac…

MALICIOUS

PDF

90.2 KB Created: 2021-08-01 00:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d73a2a6f185d2c1a8f53050546b4ad33 SHA-1: 3050cd902272e3508ac9c7150edc48d156888b29 SHA-256: f56fde56a160d6ace5f381e242de0ac2d0779b3dbe9785bd9f19e2ea0bb479e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution mechanism for phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/02430780aef0689f0ab2d7bcadf02520/wudebiwetoril.pdf In PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/fibiganizozerotimisule.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/96454403232.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/29789939539.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/31352164154.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/barowibizewate.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609498ee133c9---36425066213.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/57994368619.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/34f8od3ge7i4m8uhrko1dq1poh/fuxajawepaw.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/37559389844.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/f32261130db43dfff9d0332603a1f893/wifadegevoliwasifo.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5b41468f4aa18099b1c608af45c1b304/48149977872.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/213c44157087968e9fa9c24881c30347/vakojapanuwupezimoj.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c2be0eb23a1---17017789026.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/davefamipuzezatul.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/83n4depehkjfan20o082lj5mdk/pakesepabon.pdfIn PDF document text
    • http://vieclamtaichinh68.com/upload/files/40461478713.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/10435321763.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/15756640097.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ad4fd001670cce9f112b5663e86ce52a/nejubefifakixajo.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/bajerabuzudusivejiwur.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/jakilof.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1624400836_55208efccc.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=reformas+borb%C3%B3nicas+culturales+causas+y+consecuenciasPDF 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_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 18396 bytes
SHA-256: 42ba8ee39005733aab503a3906c312e14e2bda8904c88fb287f3f1b8bddb4027
font_02_sfnt_off00013e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E05 11032 bytes
SHA-256: 90ffdb2a66e0a5215dd69ce42b9de967bfb3f5096334db94e88dc3567f58a8f1

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