Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1f04fb2390da70…

MALICIOUS

PDF

73.7 KB Created: 2021-08-16 16:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 549de28fa8fd4357d531c8289e5f526f SHA-1: 1433fd3f42287aef9f24242560728eb04eb9a3b3 SHA-256: af1f04fb2390da70b3c4f1e3475ddb003ca2855287116aa1299932be39a7dc23
174 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress installations and other disposable hosting. These links likely serve to redirect users to further malicious content or phishing sites, indicating a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8178

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://keluargamimpi2.com/contents//files/fujupaneviwejizubegelesoz.pdf In PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c547ca7d7c2---milavogubakeburexaka.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/43547219099.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60C6777BC1B37.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/273073a423c0abbcb72ab7a0bab2c60b/30893320441.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c949be5525---sefavonapekenalopokakew.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609281e5d18af---vujofugusosadeduwesoxura.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/678cd49708492d11c14b9ebff325bb11/92411996014.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b11m8lo1qkqk2uq1v4ddku8qb4/77256336884.pdfIn PDF document text
    • https://areicon.com/images/file/gufazubalokefo.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/832348eed3d08f99944fd1e23a486389/25719291786.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac519ceee2---90804230143.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/xojubojaxebid.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160834c0f77a12---fumafanixagivetuniteri.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/87351332043.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b887ebc5508---jadanuvoni.pdfPDF link annotation
    • http://guides2alpes.fr/uploads/file/66205359267.pdfIn PDF document text
    • https://aaaxxion.info/images/file/zujarusufaxopumapuz.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/o12hr2hl6dcj6ilem9kc652bj1/ninajiladirivaparofuf.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/jivizakovezavidijenaf.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/nl6kse4psjr8njkac8fdai2p93/vugalorifijirut.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210615215557_08vj4f.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/xidatanemopato.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/norusovafosevuzafurok.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abfac4af6c5---kowebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=differential+equations+with+boundary+value+problems+by+zill+and+cullenPDF link annotation
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 11596 bytes
SHA-256: a2f377b4fd2d1465577db9be1552a7d055821fd373185766b362bb660be590bc
font_01_sfnt_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 17784 bytes
SHA-256: 7833db833aff6d77204ff121de1671c9b9e63e1c2e6ff6945b748cb9acda64aa

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