Malicious PDF — malware analysis report

Static analysis result for SHA-256 209ce0ef9f278744…

MALICIOUS

PDF

78.4 KB Created: 2021-09-01 07:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 87fd714aa13018c2090ea09a71f77818 SHA-1: 5e1b2f85a5e9a88fd2ba4ee1b670de52098070ac SHA-256: 209ce0ef9f278744fa2ef954d3fc49a23f5b0d03567e01ba894d82365ae955da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, which are likely used to host phishing pages or distribute further malware. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a coordinated effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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=the+cost+of+fencing+a+circular+field+at+the+rate+of+24+per+metre+is+5280+find+the+radius PDF link annotation
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d498f4d8a7---lasajumuvajizis.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/49340227767.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/degazawifun.pdfIn PDF document text
    • http://airsoft1.ro/files/file/bidesefepevofivutili.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/50584598564.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ed5bbee45---89641763849.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/78832733204.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0596900001628039975.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781f5244a4b---70598302266.pdfIn PDF document text
    • https://geniodelweb.com/file/wifalonaza.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/622b5586dfc20c8896699d5c548039d4/70325860035.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/86681788153.pdfIn PDF document text
    • https://aspirans.com/files/file/vudoweropufifan.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/aav5asmk8lsucpgqcif200hne7/padunatapukazapuveja.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f32aabf69---58745381270.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf89750374---rinezurokunazujapamasof.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/gibibadisos.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/pizugulururulosixojo.pdfIn PDF document text
    • https://tomas-music.com/contents/files/futomejido.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/lerunofapiwijojenalufufa.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/55b8cd7a134f31b05f5ce3147041d6ce/89272448160.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/53613165050.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a296127caf---95532822950.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7fad112609cb43bc74560f57f2c6181b/98312323299.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/8680132535.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/2ed9e7f628e0019e3f4ec97390014a1d/28286444883.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_off0000c6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D7 11792 bytes
SHA-256: df23ebb887fc9c21d7a4c6658e557e07b95d5041b5b93a6e272d546da9f3befb
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 17452 bytes
SHA-256: 4549796cc6626ec7fb910b5f9c2c867acabdedcc86d2a281081032b2d07f551c

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