Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e87b3a69d6a1047…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 23:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fcfecc52448e72d8fcc659b0eed4f533 SHA-1: 3210d3913f62081defe619c581ed2f4b9ee14d5c SHA-256: 5e87b3a69d6a10471f3e80e2f1f9b50b2fa03207b55b39384facd593ecf64ed5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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
  • 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://luijkzonwering.nl/image/file/22148351474.pdf In PDF document text
    • http://baharev76.ru/userfiles/file/47192251412.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/71513425737.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/likegewonukezutadifoxunig.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/51415630571.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/jurasarusuto.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090606502173499.pdfIn PDF document text
    • https://oferta.lt/i/File/19655338985.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/xusunixuzujivek.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/zaruza.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/49728283823.pdfIn PDF document text
    • https://ienter.bg/files/6768154832.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/jizejaxigerajakiririgo.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/84813611569.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/vezuxodesikunavutawe.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/vijogutisan.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/nafivevagexol.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/41633775769.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/wovekotutuvez.pdfIn PDF document text
    • http://newcityhk.com/userfiles/rixegilujebenalexo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613879434ef17---funifigiwisimigax.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/donapepazasisinabikosetir.pdfIn PDF document text
    • https://themalc.org/files/file/karibuwojitudaregi.pdfIn PDF document text
    • https://egf.tw/test2/images/file/jumezuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=words+that+start+with+c+to+describe+someonePDF 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_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 17900 bytes
SHA-256: 6ac5d3aed2eda13d82bb1e67261f4da106866c76f1565dbfe0dea3c92259e7ea
font_01_sfnt_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 10808 bytes
SHA-256: 6c57d4ba91573f2f4b5396c7d4371e0d4ecf1bda7a67989f8b47c4615016d4f8
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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