Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddb617c9fb17fc5…

MALICIOUS

PDF

74.9 KB Created: 2021-09-26 10:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7c42536e658a1dbc5d5ecedba0b43aac SHA-1: 7304fd74bd3d567a73dab5eba26d45e6055c0c5d SHA-256: 0ddb617c9fb17fc55b864d535f864c107e7b88681f59ce526b3934f521c37ff2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gmt-tw.com/app/webroot/userfiles/files/gagupeselifeguvilow.pdf In PDF document text
    • http://robedecreateur.com/img/files/91935724211.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/47049328961.pdfIn PDF document text
    • https://sledovani.gpshlidac.cz/www/userfiles/files/10124867089.pdfIn PDF document text
    • https://limsurempat.com/contents/files/nonek.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/dedomajokisana.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/86988527525.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/fuxenivon.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/0ia6a9i9t1h3c6pmi33uli3jl5/gajugezerogagafuraxojiv.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/47972965022.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6a25e63834ff6fd843198629439401a6/warebonevevuj.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/larewokisipe.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/rinewesomifutapirogef.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/12989229128.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/sejosik.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/zerovuwulug.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/dojigawevuvopu.pdfIn PDF document text
    • http://cy2hand.com/userfiles/feladutezedakinonika.pdfIn PDF document text
    • https://botroul.be/uploads/63585705922.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/80831438210.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1ee82e7e196bbc1aa55636ba40ac18d6/55880763866.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/5999740777.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf55084e7b---xavukogumumofomawifuvawez.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109202246254099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=psx+roms+zipPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77F 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_02_sfnt_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 16660 bytes
SHA-256: 3ab91383b8cb7556d8c80590466d573d7d35b053ab79b1742a290f2f5ed8bdcc
font_03_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 10032 bytes
SHA-256: f3bcd68c7cc449029a2b290a27dae6ff379e20d1d5b3b282cedbe709363f52b3

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