Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aea12bf5b5198ac…

MALICIOUS

PDF

75.6 KB Created: 2021-08-18 16:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78a49abf90579f826852aef070a32fe4 SHA-1: 050df90cd2dc6dc802a3bf4de6fad3002135e6a9 SHA-256: 5aea12bf5b5198ac4105e8007fdcc2c7b2afa5d9c9966a0c99f4e6046aa28fcd
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing analysis of its specific content, but the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/9b1bbb4502a63efb92127eb937a08313/xonaxomipenikinulera.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ed5c8522227---tekiboramu.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/694c3688a15abe6e429f7a1be298ca04/nesafateji.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/ce328e5497835c85d0fe85cdef7c321e/25376563719.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/eciqlgu7h0dl6v6c7l7qdha2t3/82006497929.pdf
    • https://legend-chang.com/UserFiles/files/lesizoretuxikiz.pdf
    • http://qdjshg.com/files/file/fegufuxob.pdf
    • http://srividyaastrology.com/userfiles/file/lumapufikizixudibutu.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0b983f5ef---84828934948.pdf
    • https://shop-ecobati.com/medias/upload/files/11209219004.pdf
    • http://nationalcoopadvisors.com/userfiles/files/jasupono.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4ddc52d9---95796448957.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e4e88dbed66157b59eb89d8974b7de0a/lomobufekegovemi.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f99590fd5---74547264324.pdf
    • http://qdjshg.com/files/file/7714460898.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0vm9klrigeku9va0etq8dfetu6/rigutu.pdf
    • http://aromaonly1.com/yamituki-n/uploads/files/riwevemozebolebazizil.pdf
    • http://gazosilikatnn.ru/uploads/files/89408354251.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/595960912c0587c55b3f3169490f60dc/3058996755.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16098daf7c90b5---dixopani.pdf
    • https://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/56084416747.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/fec19ef09904224a8e7eda1d25b239ea/56011273270.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+many+quarts+of+oil+does+a+1999+ford+ranger+take
    • 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_off0000c231.bin
c48d65e70fb840a21c9f4d244c1ca6ad500ff84d62130beecf12adcb17f1fb64
pdf-font-stream PDF embedded font (sfnt) at offset 0xC231 11444 bytes
font_01_sfnt_off0000dcd7.bin
daa539bde05ca939bb720aee70bd967931470ac62c89a3ec0bd03c1067c3e8de
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 16696 bytes
font_02_sfnt_off000107fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 16792 bytes