Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8f2006e2917ebc…

MALICIOUS

PDF

90.0 KB Created: 2021-09-05 22:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0423884a88ef4f41ac0d28949c6c83b2 SHA-1: 036eaa44e2f51aec9efea4aa824950a492f50c4f SHA-256: fb8f2006e2917ebc25be2e792c390152d4b9f810a8cdc8f9c708f5c14acec7fc
156 Risk Score

Malware Insights

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

The PDF 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, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 http://tovicetour.com/FileData/ckfinder/files/20210821_CEB256E70BC5862F.pdf In PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ce5dbe73d367b497099822e191380017/50975072570.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/34325738352.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad302ba654---pezujudotonipezow.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b62721b6da2---12197945782.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/jelalowuzaza.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/wikiguf.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/396428f5cd4d6cea2e12b20f3f875256/2001091809.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/jelitat.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/24/file/89587924965.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/fa670d82683367bd6389a5cc65442bbd/27644645013.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nimidifuvoguwowufurefewof.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/ravafufem.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ebsmng0dj4dknj1fhmspimtmi0/23369961041.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/kedoxibaritujogefef.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/viradupotavo.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/33246806296.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/fadedu.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd601147704---bodijenemegerelinetikope.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609028d969365---60067634600.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/tadawusadore.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/npje11d8c6a46cme5o60n0upa5/46436335685.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/mejotesalumixexiw.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/kolarutorumox.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/24636909919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cancer+ribbon+colors+pdfPDF 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_off0000df39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 18308 bytes
SHA-256: 7baafc02c8e1d5f580e0ac7a4619d45687687e11a427a2cc9a18a23f58bd0b08
font_01_sfnt_off00010e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 17484 bytes
SHA-256: dc855e6731e7c246d744bd005b55e032918d52ba142723d99ad4e1d1936b8045
font_02_sfnt_off00012934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001414b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1414B 10688 bytes
SHA-256: d2cd12ee6513a07dfa70c0e94048108466c86d92da255fd551ff519e5a3f85d5

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