Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb5932c1c59c8ea…

MALICIOUS

PDF

80.9 KB Created: 2021-09-08 11:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70c148130f86f09ecdc6634b4c55c6ec SHA-1: 9725a8c4943165a5e4fcd34f543004c67c66d92f SHA-256: adb5932c1c59c8ea015afd59e45664d023f2236727d5f7af5cb7a952a637921c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure strongly suggests a malicious intent to redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4272

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 http://biurod9.pl/public/userfiles/file/58087943980.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160771c595717b---85947060810.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/87371433651.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5aebc2e63a964245a6219efacc0454ca/15655722294.pdfIn PDF document text
    • http://veronikavilla.hu/userfiles/file/22633676561.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa47dbc9256---89032549186.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5e03801a6---7132523491.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/fisifomorofefapukilu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/193d2317fe1dab111af6ea14f4effd67/49061948836.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/94358330284.pdfIn PDF document text
    • http://perksys.com/userfiles/file/79719857947.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/9715892176.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/wibowugezenoxasefilumowod.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/gefexibafafisupetuzuwe.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3crf0d0snubjjc38arg3tl6ldd/53124348956.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/pinawevusoteleragidopuk.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/wipoxatekakamalijob.pdfIn PDF document text
    • https://maclashoes.it/file/35666811021.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/68e1207662b52fa05b97f56dce8ecfd9/pepukupojoj.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/39b4f39eeb01fff7a8262f994fa0552e/83838988799.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/5c12b73eec1d7a8d48735f45aa9b53ca/tomikuvapuka.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/847bd21f7644c5558681ef45e93f37c8/3167287283.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/d68708f39fb25953ccc6083c766978c8/lozaxemesimoredafafatadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=metaneb+user+manualPDF 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_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 17992 bytes
SHA-256: c1a5c1e5b4c89f54b38f4aa7b5f2cea80e3c060dcaef87f76ada242a5363461e
font_02_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 10288 bytes
SHA-256: 2db88072a0146f2ff8cc5a99d76934303f004b9230758f92871e2ab8d68b2c70