Malicious PDF — malware analysis report

Static analysis result for SHA-256 365e4ae67a7a46f8…

MALICIOUS

PDF

70.5 KB Created: 2021-09-19 18:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6c48d03cbcfbf500c54b1647a004ac82 SHA-1: be27d388e9f94a427e7d9f8306da0f3d38e3fa2a SHA-256: 365e4ae67a7a46f80cbafe9a5cc4eb586b7fd34c4dcc69c25fb78efcf2ed0788
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on disposable domains, with multiple URLs pointing to PDF files, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cargotavio.ru/files/file/dafajosakorotateborika.pdf In PDF document text
    • http://sharon-barron.com/userfiles/files/vejisunijezodofa.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/37401539502.pdfIn PDF document text
    • https://basisnomor.com/contents/files/13775731431.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/44842256194.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/fazedu.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/a63b7nqc0fsacv67qihbs6mr53/wevikalinugewepenona.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/vusore.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/valanowepafalugozime.pdfIn PDF document text
    • http://elsped.hu/files/file/xiloramuzowavinetow.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419afcc0078---tulikekiw.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/34051679536.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/51589783424.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/ruvixigoropumokifos.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8bad49042---mowukozezufizikijupafi.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/76159070218.pdfIn PDF document text
    • https://soechi.id/userfiles/file/xaxokutijutatomaje.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/83508102332.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/bosubetowezufiva.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/vamelisefede.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/gimotezigokalunarozu.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/43591833857.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/fapiledafakanum.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/77846160954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sonic+2+hd+apk+androidPDF 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_off0000b553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB553 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 10456 bytes
SHA-256: c5f7fe7b72dfb4f0b83fad5defe72da5f1dbc76a07e59fe4bbc131bae5b3cff4
font_02_sfnt_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 15620 bytes
SHA-256: c1d5a81fab65daf374247f6cb1291d1987fd77efe5e0d3d41326f3c046f45146

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