Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07c6756ca30ce1a…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 03:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1f62c8b3daf55d71deadf640b022f75e SHA-1: 4dd833c8d93d0e9639aa7a38358fc46c2dda8a86 SHA-256: e07c6756ca30ce1a4f9c12d442c7541eab08cf7f062db7cedf2d51078e008480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • 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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d1e11dbc8151ef15483151a6c7eef4ab/80503056697.pdf In PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/37950002775.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/nafave.pdfIn PDF document text
    • http://vhz.cz/user-files/talatib.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a594f3879a0b48d8c5420464c614d4c5/vinedumiradatutagiveguka.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/23227838461.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/77592134509.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/wonik.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/35668569691.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/71943924687.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/jasiximibo.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/56626855689.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/zowevinomupagegatet.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d75398075---51667527579.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/gajinenudatekogetuwi.pdfIn PDF document text
    • http://makrostal.pl/user_images/file/67641271616.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/luxexoxolixowenotimazura.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/xejijopawesobutamefokar.pdfIn PDF document text
    • http://flomojapan.com/upload/files/puzerojawitoletufozemofuj.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/fd5bdb1278a22f47097408c95925822a/poxufomivenomenimaz.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/wopiduw.pdfIn PDF document text
    • http://m2m2design.com/userfiles/67924011902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=type+tamil+in+androidPDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/50636084941.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_off0000b3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 10460 bytes
SHA-256: 9c5d6588cdafdac654d881aa851841c3ccbac4c644f5dd1c149fb15926883800
font_01_sfnt_off0000cb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 17692 bytes
SHA-256: 0d3554e52df9ae1906f51be845d0c77107b7ea71950fe6a4864d70adf0e5ef3c