Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cdfd1b5ca3c184…

MALICIOUS

PDF

63.5 KB Created: 2021-07-13 07:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 57e0d5c52db02b417d0f496531b32c01 SHA-1: b676341c4de50468ea1945e9624b116ca311df64 SHA-256: 79cdfd1b5ca3c184c423a3cf0c0d2da1eec2d933e2de99b39a3f11a01fbb08f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document functions as a link farm, containing numerous URLs that point to external resources. Several of these URLs are hosted on compromised WordPress sites, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6298

Heuristics 5

  • 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
  • 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://bandai-k.com/userfiles/file/22134593779.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae52efab1d2---29750671502.pdfIn PDF document text
    • http://dothi.info/images/files/19275450545.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/osbqs9hge82v74lh9bn6t7pl66/49899593231.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b043e32b929---24626722936.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa28b4805a3---36116455189.pdfIn PDF document text
    • http://usagimatur.com/files/others/ferutazopojubobuwefulef.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bf8b470de---25628551480.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d25b7c41b---wejifaxanufu.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/tesubamitolafuxofasimi.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/numemakizol.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/4ud3llik73m0m293n90derbh23/466190345.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20216551603823.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/qnqtug6jb2ofa96h8irnq8fbm5/kafijimugedorimeruxaso.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ee7f042e---10843656660.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/redikigabazurenar.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/64049959123.pdfIn PDF document text
    • https://bamor.org/userfiles/file/jomogezinulabidigezumelur.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/zijolubifose.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/02ra3m3lkamm4clg9rgcb7nu0u/nimokufugevolilebuvog.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/26d6e9978c43a2f445bede19fc9440ee/gamutu.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/jasesigagolud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=oh+you+re+approaching+mePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDB 10748 bytes
SHA-256: 2406651ee3fa1b086cbcc36065fc7d80c64fe6247714b1d0bc21d2090ffd0990
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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