Malicious PDF — malware analysis report

Static analysis result for SHA-256 6059b1e4f4bf458d…

MALICIOUS

PDF

72.3 KB Created: 2021-09-20 06:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cbb5c4d7d4a21db11f2fc65d61144fcd SHA-1: 1b30566158696dc27c0824055fa307d984cfc1e2 SHA-256: 6059b1e4f4bf458d1d1904bd6e220a0fd7b1c1610dc9e735b2250d2771694b54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of a 'utm_term' parameter in one of the URLs indicates a potential attempt to track user engagement with lures related to movie downloads. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://ketchas.ru/uplcv?utm_term=a+quiet+place+ii+full+movie+download PDF link annotation
    • https://cuatudongsaigon.net/uploads/files/jovufuzu.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/75522686807.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/24300580214.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/voditi.pdfIn PDF document text
    • https://tdfstore.it/file/14349631533.pdfIn PDF document text
    • http://scpt.it/userfiles/files/gisukusega.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/zepajadafalikapu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613459600a2b0---dugubixokomafe.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/pisukoxuxezegu.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/87727887765.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/44176677653.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/95577011066.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eec3eea73f---waradowitepewaloloseza.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/9fa211fshagtru4kteanga8kj6/86513830869.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/litinigumasibodojum.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/feguduju.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/belun.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/ruven.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/pavalukivif.pdfIn PDF document text
    • https://dm288.com/slicice/file/mukezawezabipirukaxigev.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/gukelur.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/94185173878.pdfIn PDF document text
    • https://bacsionline.net/userfiles/file/69694864293.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f0e742bfb---21727165359.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/pesufusumikugamop.pdfIn PDF document text
    • 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_off0000b863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB863 16272 bytes
SHA-256: 28a8a715f0eb09efa621c050b07aa007160159808f8a582afd75735829096de2
font_01_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 10892 bytes
SHA-256: 75df6deb52cf853950943203031c482aa496fc76e876581239346f9d6462f5cf

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