Malicious PDF — malware analysis report

Static analysis result for SHA-256 302c8fadf77f0707…

MALICIOUS

PDF

79.7 KB Created: 2021-07-05 02:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd335c8abf9b1f32a39e384ad96a09f6 SHA-1: 59edc68130f856b4ee020a0fc85de2aa79e5901a SHA-256: 302c8fadf77f070717440fdc89f1bf2b6219a747882d63dbd0cfeef0c24c34c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs pointing to compromised WordPress upload storage and other domains, suggesting a phishing or malware distribution lure. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the attack pattern of directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=the+standard+reduction+potential+for+cu2%2B
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753b1bcd007---junililenolu.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b08cf21d34f---xuzul.pdf
    • https://bisnismedsos.com/userfiles/file/vupokugidijutosogu.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b539dcb5078782d260afbf2346798ae4/56006893473.pdf
    • https://theatresaucinema.fr/uploads/file/60981726019.pdf
    • https://ascinfratech.com/clientprojects/trading/file/44805581041.pdf
    • http://barcelonasixtytwo.com/userfiles/file/63579034785.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a05d86c4---88622773980.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c62346beb10---xoroniwafafejisu.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dc61d618e---mugukidibukorovixitiga.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/v4qbhe6fqp07ftqve0kj2h3het/77072150597.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2a7bc71f---12743669141.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097116122e2a---51959394403.pdf
    • http://qca.ch/userfiles/file/74533772692.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/jff0s8guju1akv9gu449qq14hn/22125203180.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090b33988c68---nupowinekid.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085acd50b322---45268893099.pdf
    • https://takipcisec.com/calisma2/files/uploads/bovodepozez.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/66132177085.pdf
    • https://tecnicadovolante.com/images/file/xutodajaripuwo.pdf
    • http://studiofranzoni.eu/userfiles/files/26065233981.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792702ddda4---vakog.pdf
    • 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_off0000d30e.bin
1752f3d3b4acd4bc1038566044c071ac9c578b7c8d963f8af11b94710aed598b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 17152 bytes
font_01_sfnt_off0001002c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 16792 bytes
font_02_sfnt_off00011843.bin
a8cdc6a93ace832799423fa688a21d27b91b2aa7e69aa7e24d5817c5160bacfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11843 10900 bytes

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