Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ca03d9c24f8f8a…

MALICIOUS

PDF

85.5 KB Created: 2021-08-25 21:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 017854d19fc6670b004974f632429bdf SHA-1: 9407113b5cc3dc92c66e29deb216b351c93904f3 SHA-256: c2ca03d9c24f8f8aa9596312c0157e103fdb42c9ca0bf68420d142cb7a60240e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress sites and other unknown domains, likely to host further malicious content or phishing pages. The presence of numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest an attempt to manipulate search results or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9cc55ebaf---8264851579.pdf In PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/8515a44c66345339b6f1f3ec4e11c36b/37599758116.pdfIn PDF document text
    • http://clerus.hu/files/file/44569231234.pdfIn PDF document text
    • https://aspirans.com/files/file/9382716307.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/mikedijobibilirexopofivo.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/vuxuw.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c494c006bda---xoremosamazafemes.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c8c28acf0a8178925ecce403cd99f9a4/kapijazamububag.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd17b1a7efa---zakad.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/6266549889.pdfIn PDF document text
    • https://artenika.pl/fck/file/zupikimonojesikivagirexe.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/30647894703.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1111d6d386---jinuwabovasijitup.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/47223f3dde16bff025552c85b55be2e9/digeguzo.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/mozivuwerajeloramigagelo.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/37357404529.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/fopoxaregasafekipiguligim.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6580326fb31871a450729971d9755f05/78106553084.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2fab0c30---napepeduvuvasizosovufij.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2c8f762d113dedfcb629d26240cb6dbd/79872786393.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca530db3f5---diwebugelofumezape.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/8aa3c437f113cb009fd20a4b7d0390a5.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8044c96744---18816805807.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/30274527208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=stick+games+unblocked+at+schoolPDF 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_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 17280 bytes
SHA-256: feebf21c4fc9a25de5ecac70327be20d0535def1d33e4bca09ca5f1de60d0ee1
font_02_sfnt_off00012d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D36 11124 bytes
SHA-256: f39dcd05df491e1849fba0d80dcca07ab4b919fc1ed3d3b8cbd1ed7173b14b44

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