Malicious PDF — malware analysis report

Static analysis result for SHA-256 84666650c63c176e…

MALICIOUS

PDF

196.7 KB Created: 2021-06-30 03:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb532be84feaa3df89de61a924654446 SHA-1: 6a6ada7d5cb4da385314819b93a1e07759b8ece1 SHA-256: 84666650c63c176ef4f26068ae52260027a410d0cc7d7784886a3edb291b43c0
86 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malware dropper, indicated by the 'SE_ENABLE_LURE' heuristic which suggests it instructs users to enable macros or editing. The presence of numerous links to compromised CMS upload storage, specifically WordPress sites, further supports this. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9060

Heuristics 5

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac329d4a83---jokuzukibojematok.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607fc50d34d9b---72234570573.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fe168ea63b1eb53bb9a3e7d26bb46108/guxevilunijojefakafeju.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/eda6060e6e08e1272a71abe5aeea8eae/16813861402.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4e93a69ab---mubuforojax.pdf
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/tepojowuji.pdf
    • http://www.halpellet.hu/userfiles/files/mibetusababikuta.pdf
    • http://china-zzld.com/uploadfile/file///2021053000362325.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4d163314d---89006046446.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f7a45c3d09eb788f2f3cf8e3a8789046/nariredipimugeruwej.pdf
    • http://pr-jam.com/ckfinder/userfiles/files/roboruzugo.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a74824e0186---57999294810.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca8391c392---kosupopabakulololorevut.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa884a661d6---34753144880.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160761654c2e8c---2810314866.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c7521ea8e---foporefag.pdf
    • http://maybomchuachay24h.com/Images_upload/files/gidigudizilefod.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6af47fcdb---4857331648.pdf
    • https://agentcctv.com/userfiles/file/16795787445.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c14c464a7cd---xawomimirati.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0e759ffb---25558321999.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160710e4b2124d---95055482578.pdf
    • https://campermagazine.tv/public/file/xotexukugamelen.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c52930d3332a64c6f947a70116171841/futizoduwof.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4356a1d0e---joluseselewun.pdf
    • http://udokutscher.de/gfx/userfiles/files/zipojojuvita.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=variable+is+uninitialized+sas
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028c04.bin
a9f8cc5ea6e51fdf12048276c53abf4d9c76ac8de2e10390c55ddebc67bc5b19
pdf-font-stream PDF embedded font (sfnt) at offset 0x28C04 10388 bytes
font_01_sfnt_off0002a3ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3AD 16792 bytes
font_02_sfnt_off0002bbbe.bin
5c13cceb9d36bbc2bc20aea0fe1d16ac5c722eae827defaa6d249ccd2c25c082
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBBE 16160 bytes
font_03_sfnt_off0002d142.bin
5e09efa28461eddf421f168032aadb5933c554f9e684188497a316800f5997bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D142 18552 bytes