Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb95930fc04e3d9…

MALICIOUS

PDF

71.8 KB Created: 2021-09-25 11:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 23f0b50e9fda5a89f6eb0108acd9954a SHA-1: bcd957d94f2b1e16e4fd27bde83f742ed4b15e40 SHA-256: 6fb95930fc04e3d92cac3d0ecd00edd464fcda3089676308759486c3a8d30ea0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external links suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=all+eyez+on+me+assistir+online PDF link annotation
    • http://synergyproperty.com/images/files/14724518942.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/14600342375.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/26565339526.pdfPDF link annotation
    • http://nemochem.cn/upload/files/putugodamibobizizifarino.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/49751176369.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cf243e432---96344829508.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/noxugunojexo.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/funumevirolidobife.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/55812723661.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7bba463e6928a4f384b00c7e3b4466d8/bagelisa.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141e403138e4---81042871535.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/97041585088.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16142d5bfa540c---wizowifomujolokenasub.pdfIn PDF document text
    • https://creativetalentnetwork.com/ckfinder/userfiles/files/konebofibexajipetinisuwiw.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/ruzokafagavagob.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/jodas.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/wesodazunu.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/moxijozupegoxugepo.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/788764ff625760d9db13e15f3a69a916/34750235852.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/a409dd61d7c7b371c1859b52d744bde3/zofizotulimuxefegabegepaw.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/3940142212.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/wisikamiterosagob.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210910083040106392t8s4s0.pdfIn PDF document text
    • http://cosmoscm.com/contents/files/50175093878.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/dasaripipigotisip.pdfIn PDF document text
    • 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_off0000b661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB661 10424 bytes
SHA-256: 00ccc76274d1057ddec3c909fa31e4f986ed6b93f1ca3672663bffc4b08692cd
font_01_sfnt_off0000ce13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 17328 bytes
SHA-256: 2610556929e7f8f72f1e5b2477f23a565776ea2c8cd67a8da4d9317667d044e1
font_02_sfnt_off0000f9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1