Malicious PDF — malware analysis report

Static analysis result for SHA-256 b289710a1cbba45d…

MALICIOUS

PDF

80.0 KB Created: 2021-08-17 05:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dd41ce44a4606c6fef96616bc3844e1b SHA-1: e0d26e085f2eba7248994f84910e8420b5c86dc6 SHA-256: b289710a1cbba45d31573fae1bd7ca0addb71d8be1655de7ffd98bc254348451
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to obscure the final destination. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://blackivy.pl/userfiles/file/banofafegure.pdf In PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210720_2A45D2659B329D54.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/fipikenobonomukudifezape.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/9a470c64e16f242d41b7863849a01ab6/gifiwapelonopefaboramolas.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/womipipasuxebavego.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/dfpt2n3b4jnddm1189fpdr3bas/wibugezo.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/wurem.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/bipokavesoxukodexofo.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/vukew.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/98603695040.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/thscv7ivguvpqj95f6bpdv68p7/1129531511.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/kifedes.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/695f648b60051d1039e1b2fefee3baa7/supur.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/51703276452.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/690df03abea4d086d9e49887f9379922/37165598559.pdfIn PDF document text
    • http://lhsclassof77.com/clients/34792/File/27040979295.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051419301240.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/62afc82f54116e88da0527b6fd223eda/biramoluxijelozoneb.pdfIn PDF document text
    • http://signauction.net/userfiles/file/37889089207.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075fa78b515f---7396020138.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbffdf3d85---39169684360.pdfIn PDF document text
    • http://indecomavo.pl/inc/50733980184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gta+5+offline+pc+requirementsPDF link annotation
    • 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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 17124 bytes
SHA-256: 1619513ee02cdd3bf3d16dcd735159d747d426a48d1e7b5393a7a51cadd6379a
font_01_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 11060 bytes
SHA-256: af51016854c69dc79af48b7c09b8d663487a6827bd9bd3296803741a059064ef

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