Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6d94bf57f92092…

MALICIOUS

PDF

96.9 KB Created: 2021-07-04 02:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 67f2f25cf4a072100dcc9e1023d596a9 SHA-1: 31ed2391608d2981a9df6684e7babfffbc3d5455 SHA-256: ca6d94bf57f920921e48030fe506d6668c3cb245603599c8eca9b2463f64054d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160767dc4bfe6e---56517484627.pdf In PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/30ac5e386bc6536759a040639f32ef58/66145205471.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/fanenesagijezapo.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/fiferomixixojife.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/25946594f8b038a92ed64d02d7d9943d/walozokuruvezefebilal.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/jr12mq5ne8dpma5envk63k7hp4/rejumaxekujodo.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/jajusubizudevaxowarig.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/pajumusutedusutafoji.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/70141282287.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/28110597618.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/digusowava.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3fe17dcb---gutudu.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/eavljrt4pt37df26s36t9f1v1p/20385054374.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/97iulv11egb0did3jnhvl6q712/35703576139.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/a86632ef7a42e5fc1fb5219008563c2e/sekaxorigefijozafejemo.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c7358975007---69334524101.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/8njas7gndone9hbac69jkll75b/9876689288.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d7d4e98ac---vozuxo.pdfIn PDF document text
    • http://markone-tools.com/upload/files/divavudadujap.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862428aea2d---98715801005.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b01fa6b2a4e0650286a2ea926bde0d6c/16740469556.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/tusovojujulupamigadovu.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/26ac4a8c3f8184889b1fd1d05469e874/zufemasikebes.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/89762928627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cornrow+hairstyles+for+natural+hairPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 17016 bytes
SHA-256: 428ca8efe06bb0139110d3929f95348c09e28234f315aa889989e53fc8c68f8b
font_02_sfnt_off00015dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD7 10640 bytes
SHA-256: 66f4ffc2a1a0ba560a8c03484e27d4adf5b22d2a2c4cc0e5cbc78467a3a61b87

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