Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e85d71748c007c…

MALICIOUS

PDF

81.7 KB Created: 2021-09-10 04:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 397f9f34e129b1b054896098a70f5493 SHA-1: 2391efe177059ff2d267999ec18fbe9d0c2411a5 SHA-256: 70e85d71748c007c982a1151fe99e0dfee6d44ae6ce42ae48e1e97c33faf4bb0
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 potentially malicious or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests an attempt to execute code, likely to redirect the user to a phishing site or download further malicious content.

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 https://gallerylingard.com/uploads/file/42513115492.pdf In PDF document text
    • http://cmsrecuperocrediti.it/images/file/2368619002.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210906160002242.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/95752777364.pdfIn PDF document text
    • https://magerp.org/upload/files/gafisixeranupoxor.pdfIn PDF document text
    • http://epicridesnepal.com/files/94361833912.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/miguladisozegapunixelufe.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/32237638098.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/bulalawoxifakik.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/gukawujunolivegomibax.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021090315242573499.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/bekogow.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/8842233491.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c6c55526---fowopumesokajoporinag.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/97556119444.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/23300878477.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/forob.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210901033536.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/vuwavegotonazawagekuvolud.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/70656868133.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/punejojapanizo.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/fulireta.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b1ab26933---42565187082.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090316282273499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=c%2B%2B+for+the+impatient+pdfPDF 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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 10580 bytes
SHA-256: 9d70ecbaabc8a6850aabe5d20fec331c8766af23c4491be2a80b73656fc49760
font_01_sfnt_off0000f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 18608 bytes
SHA-256: 349b54ab45ccf6fac050c886dd2a343b31cdd74c3dd9c2e55f2500659382b23d
font_02_sfnt_off000121b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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