Malicious PDF — malware analysis report

Static analysis result for SHA-256 00aeabbf328bef7f…

MALICIOUS

PDF

74.4 KB Created: 2021-08-18 21:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 59a202c70eb5840d4b326d8110148b3d SHA-1: a64d2940c1f25d7a505ad194fabd24cf7bdbe0fb SHA-256: 00aeabbf328bef7f06a1dc35ef0007eeab606891213e880bb8460e374e9a219e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://palaciodelosnavas.com/userfiles/file/dirofoduvupitolujebomobo.pdf In PDF document text
    • http://nprofit.hk/userfiles/foruta.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d430d74cb5---95274402323.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/90147352746.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da31ebbdf81---topijubajo.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/afb6e4ba686082d97a9775a6c9a5da6e/89708778148.pdfIn PDF document text
    • https://www.qualityitalia.it/ckfinder/userfiles/files/xoreperikidizagujuba.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/suu7ia7io5ov5npng2uatua94j/jures.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927eeca42f1---pawufe.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b874a7b031---nawopikagu.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16106fa7a03fc8---41981147068.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/a0cca28b94f1e7105212b45191ab109f/pubav.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/zujitogamoperolobosemapob.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/wamesolivepikulovovujoxap.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/316735977.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/vepijexavilalebanu.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/sedulemiruxomox.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/848d5ed949e420a1dd2b92ebd5a5dc8f/towaresisokexevevisukewe.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/vimedibotixolemesa.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/fenib.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/90124343337.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff9badc4844---xirujifow.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/12441820003.pdfIn PDF document text
    • https://duel.pl/userfiles/file/88932985126.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/56878098049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=five+nights+at+treasure+island+simulator+jugar+gratisPDF 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_off0000c131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC131 16144 bytes
SHA-256: e7328570834117eb0b95a0cc374e9c5c177fd034de8ab841ae1615aa18b49bd5
font_01_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 10968 bytes
SHA-256: df8510c28715c8ed5ab8235ba96a8b88461b01277b2ce5b0a39c94da6e1f8ad7
font_02_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1