Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beb4270d0e4f57d…

MALICIOUS

PDF

76.5 KB Created: 2021-06-26 09:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b44ee311d30508842ec3b1d2ab4d6cb8 SHA-1: c0a5074e82d928a30d6081171b51d5e07014ec5a SHA-256: 2beb4270d0e4f57dc03959132946416aa7f7f37b692cddcad565151bade927a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://premium-house.uz/images/file/43465208064.pdf
    • http://4x4autok.hu/userfiles/files/24329690940.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd8794485a---bozelidazujagimop.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/50a21bd09f3594c45e080011f50f6771/93021442417.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/90eb6a41a5eeb724eae297ac543af66a/74245430631.pdf
    • http://jinxinghotel.com/uploads/files/zosodegawepureguxo.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074c1657aaa0---jowudenitijijonegexu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854407d9b05---77828605665.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea3401f0c---33111686451.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/c62f9c8585f07bc295152b6591fd5865/wadata.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ce3248f8c---68973424413.pdf
    • http://creativetechno.in/userfiles/file/21670866405.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/k12ot53ksgh0b11ho75r0ip6fs/45292225278.pdf
    • http://aircond.md/upload_fck/file/53428230211.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f2e62ed72---91314855869.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/06e681fa1285494d79d0ad68109bda47/52852227859.pdf
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/0b3f07ab3a7c85c0b033498a1e7e9b80/zinazexodatosasopu.pdf
    • http://basaritarim.net/admin/editor_resim/file/vajodijifoxurasariwiro.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5d821fe5---dezaseximaxow.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0d7980a76f60353ee145ada9d44912e4/13099697660.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070f06ad3044---vajaxejur.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/3c0e7029afb5884d8e38ffa6fd7f7f85/pigesadesivajaj.pdf
    • http://davidhammerstein.org/userfiles/file/vavorovojevumelaferizuruj.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609366ff6c313---dokusibesiziluvajosowe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=1987+preamble+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e0.bin
439146b5c8194a130baff228fd6d697a1d302838203b0890a9f24638557c41d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 17144 bytes
font_01_sfnt_off0000f495.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 16792 bytes
font_02_sfnt_off00010cac.bin
b00f142d4f1182763e9272f84ef129eee46ade5880cb76214c0d3fd427a1222e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 10732 bytes

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