Malicious PDF — malware analysis report

Static analysis result for SHA-256 347ad9bb1ba0a61c…

MALICIOUS

PDF

85.9 KB Created: 2021-07-22 09:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff59ae83d935bae319532147caec3740 SHA-1: 18aa18e3b83a722025ee30f8c56e724524c0241a SHA-256: 347ad9bb1ba0a61c9dfbb783844b09885bfff5328b59f01e129a655eec387f57
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple URLs, many of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, but the structure suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://betalinktech.com/blmedia/file/23042851578.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608570dfbfb3f---7737457798.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5ffdecc6561538efcbaab982e1cd2ecb/39749850904.pdf
    • http://ahkjt.com/upfile/file/13322364575.pdf
    • http://fygl.net/uploads/file/190253531494.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3785a1755---vurux.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/96920536840.pdf
    • http://geredekombiservisi.com/userfiles/file/nalalafevug.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be520f7215d---27802733228.pdf
    • https://chmelo.hu/sites/default/files/file/livavavilen.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abd42fc9cf5---13146715892.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f1e6cd85557c862cba9bb21fcea66530/zexopoginibakibu.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/jagenevi.pdf
    • http://mudrkanuch.sk/editor_uploads/system/files/9380171578.pdf
    • http://adabaskimerkezi.com/upload/file/tovokej.pdf
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210624154254.pdf
    • https://acavacecio.it/userfiles/files/46772346451.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c2ebc47e6604a02eb2ca7cd2a547fd88/18638579351.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c38673dcde6---lipeva.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58b49a742---28982350744.pdf
    • https://hondamienbac.vn/userfiles/file/1938884729.pdf
    • https://thefertilizerproductionline.com/d/files/sojexigitizekewop.pdf
    • http://metapolar.hu/tmp/75573085677.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=wow+classic+argent+dawn+rep+rewards
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2a.bin
4ff142ed163f4e3b186ee10f8d297a49be5aa301ab67f31a34addf3fae7f69cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 17772 bytes
font_01_sfnt_off00011922.bin
bd3c465e795c2adaf86369c429fec9c17acb8c5ce7b8ae0c7d5d660d113f1d33
pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 10768 bytes
font_02_sfnt_off000131e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 16792 bytes