Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30ca7f169883ba8…

MALICIOUS

PDF

67.8 KB Created: 2021-09-16 05:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d1081df2dd52f77f91f5c9bc5b2b4a06 SHA-1: de55abbe18eceeca411c4385281bffcf6b1bbacb SHA-256: e30ca7f169883ba8ddfe9230829b53dc34bd1340225925f69e81951b68771053
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains embedded JavaScript and a large number of external links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of embedded JavaScript points to an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8854

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.
  • 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
  • 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://krisoc.ru/uplcv?utm_term=dance+monkey+mp3+download PDF link annotation
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f49839669e---1848437481.pdfIn PDF document text
    • https://el-tall.pl/pics/file/94178825468.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/vemopiji.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdbe4a6194---zagodowebejugulinuxivurum.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319b592f945---desafogepopiz.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/60093207606.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/gizurafamalekabaxat.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/sa2jmd6tq3a2sjoqp6nlc34r66/tarusidubuxavipesasu.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/25640349520.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/pinoderexugizexinij.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/25853455555.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9b34df097ea0798d9459ddf758691d9f/gajitupakesol.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/zodiwa.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/fufavezotojagafod.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/wikuwumemenetonemefoxijik.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/63456834954.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/varik.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/30003524247.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/35002771279.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/53027478346.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/wegavorisatepozulenolu.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/pigigewipuf.pdfIn PDF document text
    • 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_off0000bfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB7 10684 bytes
SHA-256: 909773d7d76ab990382f84aeacd384b26ad5a6e874d01cbcd194feef0b8927d4
font_01_sfnt_off0000d840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD840 19160 bytes
SHA-256: 74d86b4135c2ee70806212252e897986d4fb6fd5e62f771b7e7983aeef0e3b62

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