Malicious PDF — malware analysis report

Static analysis result for SHA-256 54418267a0304fae…

MALICIOUS

PDF

98.5 KB Created: 2021-09-24 07:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7e53fc28aad3bfbf6d15afed7df177e6 SHA-1: e3ca6bd1218c6f2bfcde15bb80ebcf77895538a4 SHA-256: 54418267a0304fae5e64d1efa6d3591f8473ed8e6d7f3f6432729e08eb30316d
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for malicious PDFs. It also functions as a link farm, directing users to multiple external URLs, some hosted on compromised or disposable domains. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=tintin+in+the+land+of+the+soviets+in+colour+pdf PDF link annotation
    • http://contelex.it/userfiles/files/kejopipelabometalubojesa.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfe8762b48---zixebefivuvogizitojuv.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/govuzawa.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/golebatozogimuj.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/64075359551.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/31dc893b060f0c3d7c7f05d7e19b59fc/xuxexalarebepi.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/22216047878.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/61938947723.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/vupuvafogixo.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210903044309.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/kediko.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/zumijag.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/44114594244.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/dexatepelasozetulizekik.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/xasuf.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/wufanap.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/fabujuvozil.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210911195343.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/pavekapewine.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/70372477706.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/43cfcb5976c8e474f773cc757de89e25/65879807539.pdfIn PDF document text
    • http://rjt1.org/upload/files/purevanewadejafov.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///vigik.pdfIn 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_off000121c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 10844 bytes
SHA-256: 45a4ad81fc6a7922f9434c59c5ee797e2458c66df52678fc5ceaae9d35ff45e3
font_01_sfnt_off00013abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABE 19856 bytes
SHA-256: 9a44fd972505dcbb4fb5d3eecbbc36168975ee6053a201d9843cccccb171731e
font_02_sfnt_off00016da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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