Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafe489bf021ba2f…

MALICIOUS

PDF

91.6 KB Created: 2021-07-17 10:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f65faa6b3bb49977902434eeb5f374f SHA-1: 506a94131a531af2fd1c1c6593c8b3ee016576f1 SHA-256: bafe489bf021ba2f7e8050024a15e5590b617ec5d4e4cc9422d4ff27fda6b821
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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
  • 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://meta-min.com/files/63936463097.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ed8b94cad---nudejejalozikezaror.pdf
    • http://podwierzba.eu/ckfinder/userfiles/files/gapozigomibuxi.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cedd0bd8---nazugid.pdf
    • http://netmutum.com/userfiles/file/lujolaxobexoniveviludezur.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dma5sk7mij8gbq1u44egkah1e/woluruzef.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160902ecbc3eba---85068867872.pdf
    • https://anakmeong.com/contents//files/pexelozawugatekizanudoki.pdf
    • https://pjkconstruction.ca/images/file/vebijewir.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34749e33a---tedoz.pdf
    • http://anandamsanyal.com/userfiles/file/vixixijeriwis.pdf
    • https://fotovipvercelli.it/file/kawisolovekiwojerosufa.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/7o7qp3169ldmvmahruoh3qgvu0/fedov.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b28ce3c53---39521980529.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5a6fd5a8135b4112cebc9a77e51c1947/xesilojuxemofak.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b822ea4d667---3854433138.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080de0938a36---vunizu.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee24c335327---77256378259.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160aa30aaa7c09---gedugexixepururaw.pdf
    • http://kangs78.com/clients/66216/File/46240644407.pdf
    • http://xn--22c6buakeib3ax0bzcc5b8tlc.com/userfiles/file/pisukofoxek.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/83431330733.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96d2636352b1c20c5f1b0f6fc0141e6d/riwadamojuzokedi.pdf
    • https://stop-remont.ru/ckfinder/userfiles/files/wowelovobaxud.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608237d3bd9c8---bedukofalulineruwi.pdf
    • http://kraski-chernila.ru/resources/file/sanirogijugufiketokutij.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=do+you+have+any+questions+about+the+job+description+best+answer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101da.bin
58b6ca94949f45ad92083acc15ab8bac4a2fcae5dc7984a7bdfa89862ff21fc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 11348 bytes
font_01_sfnt_off00011c24.bin
c0d0f723244338d55aedbbd7fe614c0302dfb249e741c85afb394a1b9bb8d7c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C24 16944 bytes
font_02_sfnt_off00014846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14846 16792 bytes