Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a3760745276794…

MALICIOUS

PDF

88.7 KB Created: 2021-09-20 06:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3539591def573494109f29ea01e320d2 SHA-1: 60be8a933ece138163170b7636bd090a82959aec SHA-256: e3a3760745276794dd810faade920676bac747f653dc626e6a2bb1f4d7ad8171
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to leverage external resources for malicious purposes, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2548

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://thy-environment.com/userfiles/files/daxuwosewumitufet.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae75311241---20658646663.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/44063981100.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/jawabepo.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/35936454480.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137396f4c8e0.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/16532015718.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/jujiwowuvasu.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/72145264988.pdfIn PDF document text
    • http://dongphat.net/upload/files/pexijisefuverimubaxa.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/15385883723.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9358d0446---vajapomanutuxozefanow.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/65956649773.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/1556354807.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/vimuxaxemomo.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/lilebamirawavew.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/zefam.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/19376016939.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/vusojefutevan.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/33755240922.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/91326865771.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/27475121452.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/19133993042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=3d+mushroom+live+wallpaper+androidPDF link annotation
    • 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_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 10888 bytes
SHA-256: bd97bdc279018041f61e47b23ba43e6923dd74c53295049e245b7d248da180a5
font_01_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1E 19736 bytes
SHA-256: 31cac18447ae27fd1cf2bbf69401fcbcb4d68fe5b2304c7df9e1a2debdfa8078

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