Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c2b049e08ceefc…

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 22:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f105db779dbcaa5f1fcc8216d5e171e SHA-1: b6f6aeed00ec75720c5467334da436154be0572d SHA-256: 00c2b049e08ceefc1f6d33d5db889a1c75f68f88720cacf97e4f3b1a66106e91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristics indicate that the PDF links to compromised WordPress sites and acts as a link farm, suggesting it's used to redirect users to malicious destinations. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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
  • 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 https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/a8f8aa15cbb4a20f66381d7531563280/85434736522.pdf In PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/72023667686.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/zonov.pdfIn PDF document text
    • http://teknis.it/userfiles/files/kilowuzanebaji.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fc270406c68f2f401bf7cdcafc9bb3dd/11279819535.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16200513403456.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/nudata.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a90576ad---63176539960.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/20166814442.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/dutatifovijufalogejuxu.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/49551331840.pdfIn PDF document text
    • http://falerisztika.hu/tmp/77139660968.pdfIn PDF document text
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/fiposetawakibefavoxote.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd9b1ba62---6074387414.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/80670755296.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/vunep.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/15962041703.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/50642553489.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/dokolat.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/files/lowufakeximutiwikixevonu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077340831395---jilatirokilofukilixabas.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/96200404219.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/87899229186.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/nl4aei09m4jnhi88g609531da1/wozodiridimuv.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/21905411500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=selling+shares+market+vs+limitPDF 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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 17416 bytes
SHA-256: 97136d26403afd373429bea87416d4ac822f649aaf488aa3525e2a9d9e42ac40
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12993 10668 bytes
SHA-256: 843cbe96099ba41f0fb23b5ad7e9cf9c4380acd88f47228850460595baf9a66b

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