Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0206a8ef48d0a1…

MALICIOUS

PDF

98.4 KB Created: 2021-06-30 17:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 91a28262bddee8d42e00eee279570fc5 SHA-1: 5ef8e58dd24cff516e2730375bf7b337e7291edd SHA-256: 2d0206a8ef48d0a13a5742658b5ea8dfcdafff46f63221c1cd9aa9a8d965a732
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize formcraft plugins for file uploads. The presence of a 'download button' heuristic and the ClamAV detection strongly suggest a phishing or malware distribution attempt. The ML classifier also flagged the PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://medvor.ru/uplcv?utm_term=download+need+for+speed+carbon+pc+torrent PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8422b080---19040307087.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/1468469494.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/794850c39597523de34d42430b254866/95045680388.pdfIn PDF document text
    • http://vieclamketoan365.com/upload/files/tisisizigixu.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/goxate.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8741e576b---42308455857.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/nabuj.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa80d17d26c---podugiribat.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jfsc3riskcj3gcphkb7uvr6kp7/jowitebawurorudizipagat.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2eda44099---51491370041.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/6726753075.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/tosumujaseletot.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/95050831625.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a7e12ea2395c7cd1f9e70e65ee1154b8/xezadilero.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/88415455595.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160798fd4a1807---99008384924.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/rirujodumobevutuponipokul.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/42738988177.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae6afdbc01---depubifoduwuza.pdfIn PDF document text
    • http://asvpp.fr/pdf/vumovixodugigafavuzilu.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/39337688351.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160700b007ea5c---jimarojatidurefu.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160825cdcc28eb---jajibusog.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/pofelapuverinegeris.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000ff51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFF51 17492 bytes
SHA-256: 61b38a0f1425e170c41c6c2237164d227be380a73805ba83c5b76a5382ff733a
font_01_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316E 10748 bytes
SHA-256: 4e6e9e4b9b325815e85f35776b9c515f994964fb4e6bb3ed9b7a05d3e3276e45
font_03_sfnt_off00014a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1D 18972 bytes
SHA-256: 1e7415cd28cd4b9b035f0d94628607c5276591f399e5bd6f3714742f4d3b4cf4

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