Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4349c132f45514…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 14:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 656d3d4e9bff2f1e020e4a6aa4d4aa68 SHA-1: 2a20b81a591b1ad2417a4f04abfa7ae1fb2b3e9f SHA-256: ad4349c132f4551488b1da3a51318496c30fe5d1886c1ffa69c8b95e69839b8e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users into downloading malware or engaging in phishing activities. The embedded JavaScript is likely responsible for initiating the download or redirect process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oguzlarotomatiksanziman.com/depo/sayfaresim/file/51145585230.pdf In PDF document text
    • http://fs-select.com/images/blog/file/86325432130.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/1911618458.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/76928428029.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/buvuwo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b03f484e5a---dojurowet.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eebafae61f---51220724495.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/37260253738.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/7433088869.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/87364160288.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/lulitufizujolakesedinevev.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/88346123657.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/31775204281.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/091906387391.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/metasisuviwuxerovus.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/75958925276.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/zutiwefijibedefefovadada.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99ef73024---7057266489.pdfIn PDF document text
    • http://araonline.hu/uploads/file/tusawofazesibodakijurofe.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/7212561963.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/jgp62km2gdk3tp5ra45vimhhj2/vasirivuzijixem.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/94834968889.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/94527896026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=euro+truck+simulator+2+android+download+free+full+versionPDF 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_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 17748 bytes
SHA-256: 5848a5a7cf9ff93db66509899fb970047c547d113ec53f8ad3086200364f8f9b
font_01_sfnt_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 11084 bytes
SHA-256: d41184d49ee0716188fdbbc8d8e1ee8ac1bc55c440fede56f7083ec79c2a3902
font_02_sfnt_off000121bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1