Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9412308c4d464e6…

MALICIOUS

PDF

195.4 KB Created: 2021-07-05 06:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dc46dca0b89a5c7fa6d635642dc7cbc SHA-1: e0c60ecb32c8cac1f6f41048ab7f875263e34cbe SHA-256: c9412308c4d464e68a02ebb128d0e29f48868c678d1ebad55617e3ad39b208b9
174 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, exhibiting characteristics of an advance-fee scam. It contains multiple links to compromised WordPress sites, suggesting an attempt to host and distribute malicious files. The document's content, though heavily obfuscated, aligns with lures for lottery winnings or parcel delivery requiring payment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/f2e489f3b1a23a825e26e23aba3a98dd/77899017417.pdf
    • http://goshaggers.com/clients/2/2c/2ce39afd4341152949bc146f79210d6f/File/luvokusimamobiwar.pdf
    • https://hattoco.vn/images/ckeditor/files/84548432977.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0877434c---xemejo.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bb842ad4---mapiwinuwinunubuwopifude.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3d381b2c---83056438939.pdf
    • http://aliceinformaticasrl.com/user/pages/gizukirabapepafipifen.pdf
    • https://ikima.fr/uploads/file/10506946968.pdf
    • http://childconnect.com/swi/fckfiles//file/72575297745.pdf
    • http://elementsgogreen.com/userfiles/file/51389553291.pdf
    • http://djapm.com/userfiles/file/divebi.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3776b7a245---90256975520.pdf
    • http://www.bandungmesin.com/file/3107677058.pdf
    • http://jyjwqj.com/uploadfile/file///2021052911430030.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/lddi3vtpjb7f1nhrukm3hrt90n/dopuwewanigafov.pdf
    • http://davidhammerstein.org/userfiles/file/venewipezizutojujadivujew.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aed137bdc47---sinivabux.pdf
    • http://www.centralperdana.com/file/36425613499.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807dcbd16a3---21221165018.pdf
    • https://aronabritcan.com/userfiles/file/87631491262.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/m84306rlst9g5p01ekg7p8icfm/tituluvafusogofal.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72efb36af---rakobedezarafalesu.pdf
    • http://petra-dario.info/upload/datoteke/nerozusisubegezavijoxusu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=biology+form+3+questions+and+answers+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_off00029b91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x29B91 16792 bytes
font_01_sfnt_off0002b3a8.bin
87a406cae93e422f4b551483749700e6dcc247741cd1bf23f9a815e490e90e34
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3A8 11512 bytes
font_02_sfnt_off0002ce85.bin
ca5733ff5be66324ae4937ab9ecaee8eafa16b077ebd85b04285685d7b4299fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE85 18556 bytes