Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e4d749c40c4ed1…

MALICIOUS

PDF

83.8 KB Created: 2021-07-18 17:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 134c233f91e8b743980f1a308aad1756 SHA-1: 9f0cc874a129c317e45fbe78e19a747528f30650 SHA-256: 46e4d749c40c4ed1deea4d2f77ebbd372deedbec68b9d5a1e7f8f21ef4104e98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://halongbaycruises.org/upload/files/xirapowowokikidasuwufi.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607340f497e08---fivozidatowetasoru.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/32374986621.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/46566745874.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/mewitidakosewudunejusow.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/695f04d008f2e2dcc0442d81b907099a/zivosinov.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/rebelunadopebokagagivoz.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210625031051351.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078406f942fd---xamomurogibebakupikanos.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/fekakovopofe.pdfIn PDF document text
    • https://mnlex.it/file/66999296774.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bee76072ce---nonixevalusul.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/s8k98f23l2m1u9ovb4hdekmf83/14522071262.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/88053259526.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/066efd9440015c9af32d95215f7be01a/56295674089.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6qu54m32mgmvt8f3rspv8m9cs7/85657235050.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/1970a65cce5f18d41a8cd234d09e8143/xanerilibupudetuvo.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/78121640455.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6bcd209e1f5f1cd14f1aef3378c8c367/zuzubufijokugexivoxiput.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/bugujijarafidekaz.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/golijogenilejupuxap.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/giwux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=life+expectancy+by+centuryPDF 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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 10552 bytes
SHA-256: fa57d63617c8de145a7eab999c6b8a1dc94a8bfdb2ff9f8aece1a1d4d8943324
font_01_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 17204 bytes
SHA-256: 365ad7199c345ce371a4ad3fad01f9e03aa8cd1ccfd194236de21e4ba7d02534
font_02_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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