Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0cf00219ffa8565…

MALICIOUS

PDF

74.9 KB Created: 2021-06-25 18:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3b37d9b33634b678cec86bb8e3cd25a SHA-1: 8dfc42bdcae5165ab524a03e84f23c1746865508 SHA-256: a0cf00219ffa856581a7dd698526c42247cc20c17b06363fd6654fc08974b5c5
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is a link farm designed to redirect users to potentially malicious content. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic findings are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0d7741fad8b5f2c06eda4ac57f073dbd/53878534286.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb58103cb2---wapelomezasomurokag.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d44584c99---99176147858.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7ef896a4---9696726480.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4c40e36b7a6a251e0368321700a475e3/xujugavuberoburufojewan.pdf
    • http://szao-spb.ru/images/news/file/30697141443.pdf
    • http://hubbardfamilycircle.com/clients/62940/File/gepugemuwimamemekolex.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/55823199957.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702d2df39af---18936945591.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/6u43tfq58j1j0ehk229prfim25/63117347976.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080df81e25d1---xojabalabajokiwus.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/0a7660362e6984c54d6b10eb821761bc/80896248620.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/59f0bbb309282cb15c8ee0961d83b8e6/senofezusajiwulaboxufu.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/43cd5fcc6166b4e6e451a95cfe2d6184/legogeju.pdf
    • https://mariellatriolo.it/public/file/vodow.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6a50cf639---nofewutebabasuruperebi.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f2a1a6d2---57267532449.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf0783a65---82810337478.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e5856e22acc8b92671bd4ed3f0a7ad79/61498031235.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/90b8f2225e8db0832c9e9a7005421abc/96035782021.pdf
    • http://voszveszprem.hu/_user/file/86672785565.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608696ab1c215---21432456577.pdf
    • http://adabaskimerkezi.com/upload/file/fupinanenivozolizosix.pdf
    • https://hirurgija.me//files/19751842961.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e917bb80e6---55505263070.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=chapter+3+matter+and+change+study+guide+answers
    • 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_off0000c1a3.bin
974e6d2033a2265d4626eec2849692b95808cf87034a4ca10d9d565ed30708f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A3 16412 bytes
font_01_sfnt_off0000ebc9.bin
9347e13fdc77c40c527f3e2b7690217e17877cdb395f48422ef81696b515b88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 11300 bytes
font_02_sfnt_off00010619.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 16792 bytes

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