Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ad9e85375bbb4b…

MALICIOUS

PDF

79.0 KB Created: 2021-09-13 06:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: be04a0ce5d01f7a4a99b0119aa59a8ab SHA-1: 92ad95ac750c8cb5deaebfc672536a1f7d94dffa SHA-256: e2ad9e85375bbb4b770fcde43cc517cc86769025f6d2007bc4f77d00151ecfd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=download+novel+one+night+love+pdf PDF link annotation
    • https://kit-veron.my/ckfinder/userfiles/files/vebuza.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/25064722335.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/21345060462.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/79624758435.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109062302088966.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/ruguzugodur.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/88008355430.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/64483201353.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfed2e087f---dopalilefuxene.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/wirupewezudanenakepa.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091200524459.pdfIn PDF document text
    • https://panoramabyty.cz/content/sefemojev.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tazoxurowupejirajaxuke.pdfIn PDF document text
    • http://sissonne.hu/editor_up/fikina.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210911_310875AA49AB3D81.pdfIn PDF document text
    • https://tivirtual.com/userfiles/file/77985875939.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/wekivinozamunifazosiw.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9294b26db7ce34535a8f7f8e9648574d/nijekofagajezuwefov.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210901170435.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb71c0ffea---xozuzugosaxibovabawikos.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161344648aec46---penepuwuv.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rakiverenufaj.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/29734517357.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/54920903310.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_off0000cbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD1 10660 bytes
SHA-256: deedf620c38b081c44c156d9cab44191b9014944737843b04ac2d77e7c1616f2
font_01_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 19316 bytes
SHA-256: deb4362f3f3140b9a5c66e53b94ca321e7404b55218717b31ffa083128abf7fb
font_02_sfnt_off000115c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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