Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4ad7b0a9a5c9e0…

MALICIOUS

PDF

72.2 KB Created: 2021-06-09 04:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fc86132042b57d6761cde5d0a35f688c SHA-1: c56232205d18aa159485b0c31625f9e00e691160 SHA-256: 9c4ad7b0a9a5c9e055ac1ae8010d7e2f22598d00cb46d04990e99f4a0a47e4a4
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://garglob.ru/uplcv?utm_term=free+places+to+read+killing+stalking PDF link annotation
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/bb8ef4f1a9b3b18389612b8f50179d36/fijesusebamisabe.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/061726139931.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7553be87b---69649769531.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/11e6a9465476102429bf4ebe2370acac/8774259918.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/62uu1nsja022svtv6hb0nll1q5/42417766023.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/rvefm5b45q4mvlm4vlb1ge4d6b/2248885387.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/48830273223.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897817b941b---momusokuberajigajepemu.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/jumotefipozet.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079899222ba7---49655612251.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/915e8d383fdea58215be14bf2d7d033a/vixuwelotaganali.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/84591858940.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/finixinupisuvu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/04e6723581571677273a9438234b82e8/nunopexulexomojojumefa.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/lv3ovirqe3sjof9dksocpl09a7/53306378084.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210607_E0B6E12078BBBB21.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9f85a4b97050022aa2633a29265dd8e6/lesejolowerupidapor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 8176 bytes
SHA-256: 57dc29c3fdeeae2b8614b6454da4d19764c9832da0e4c69a0b9454814658fa5e
font_01_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 5048 bytes
SHA-256: 3fdfbfcbeb1eb270ca05d39a4cbd2de6f364ae2f2c51ab0ce6be1e1abc591d34

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