Malicious PDF — malware analysis report

Static analysis result for SHA-256 12695193ff4c7bd7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-09 04:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7aea61986a9b085dbffa71ca0e147ec SHA-1: 667c443903543654753eb52e14275ef700d850de SHA-256: 12695193ff4c7bd73c1a3ec4291a90c10e955c9b9333fa4db842a8b268ee4fa0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136538aeb181---ravikesi.pdf In PDF document text
    • http://haustechnik-hagenauer.at/rivirosafibodokogot.pdfIn PDF document text
    • http://podarox.ru/public/files/lajafosabob.pdfIn PDF document text
    • http://acunambalaj.com/adenoto/upload/files/diluropisaxosi.pdfIn PDF document text
    • http://www.celso.org/download/7603897141.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/nupebezilipexalunujopezul.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3a8070f57ffdc620b428f09c7088670/70676637912.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/jinino.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/pepozitoruwitafijuko.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/tikafuromewudoj.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f9ef87979---37513761404.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/38450897940.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/884516708.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/fuxawezorajiboxugos.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/72590458849.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/refejuwo.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/65803405449.pdfIn PDF document text
    • http://findacommodity.com/upload/file/fegimaxinosaxa.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a2dcae79643571b662c1fd381a647219/jagadakovuwesukuxo.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/73855581988.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/zexuxiwamojad.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/xogeva.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161332fbca46a9---rupokosanizadarera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=free+fortnite+skins+on+ps4PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 18144 bytes
SHA-256: ce13dbf7ae786f8f2c7e7bbb196a357110774b47046fcf92cb64b994c39174e2
font_02_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 10292 bytes
SHA-256: e9852eae3bccd1ad3f26b748eed74ebae62b21f4db4c1794338be1ff6ad76133

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