Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccec4b2930c0e78…

MALICIOUS

PDF

86.5 KB Created: 2021-09-01 07:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 311e9df96569f8e67b84bb80a1c373e8 SHA-1: c2d342d6e8667c4a794d60ddbdb4c8596c4ad218 SHA-256: 0ccec4b2930c0e78a197b8ef1efc7620eaa9449d076532964cfc9123b5fc95aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload storage and disposable hosting. These links likely serve as a link farm to direct users to malicious content, as indicated by the ClamAV detection and ML classifier. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://condosworld.com/abisol1/userfiles/files/98702711343.pdf In PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a8128968fa8---diwadonetabowesirusizo.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/i4i57b5iou7vd9e3p3gqtm9407/vegunediviwun.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/bc97c2f7218894f817bd6c375db13a2f/51856176166.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/15804925788.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1752cebd1f---lawigupojalekulaxuwexaz.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/tufupatidanirufe.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/nisikizasolilige.pdfIn PDF document text
    • http://premium-h.info/files/files/kuvusokoxogebulamukumuxi.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b15fc2b3a5b5bed4edeccc077f839b70/vejelixabeloxakon.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/sozosidowiraduse.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c6fe8596fbe9282bd4f079704a2529d5/85797530339.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/nupjred9utrgk7p4monb52gsk2/letakubumasefatefitusag.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975c7338988---xomesuvirudanoxugej.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/75100085268.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/1l8p7jvna7j0sgdmtts1o7633a/82279149684.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/zurajijetinepakubulomara.pdfIn PDF document text
    • http://splogservice.ru/content/file/47237002072.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/94231550563.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13165223798.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612e7301f0d01---munigute.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/qfefk8tovl5gfsvnk0eb6g6dmd/48351661716.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/69729d48e5f6a5c1c5a8d8a025905e1f/1850621186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mr+walton+please+control+your+love+read+online+freePDF 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_off0000ec33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC33 10972 bytes
SHA-256: 408d942814f620d984e425c71f29d13e68f054a0aea043658a2c04707710acc2
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 17976 bytes
SHA-256: 7a5f42f0fcfd925308ac53828600ba6eb2e0764db3d4fc3b4d2ed7426dfd0f24
font_02_sfnt_off00013417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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