Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8823e502ce6379…

MALICIOUS

PDF

127.7 KB Created: 2021-06-26 22:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b71e6074e76398fd0783f504bb117f27 SHA-1: 20373e5a508c386f3f9dd157edd5b9a421dcb7b0 SHA-256: ee8823e502ce6379ebdddf67191c8223b59a3b79b109e92552d888d47edbea3c
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection further support its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://xn--80aamdqpfpr.xn--p1ai/upload_picture/sozixe.pdf
    • http://adria-ex.com/images/blog//file/zataxu.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1937aa2cd2b80165a30ed31dba8a892d/97945596743.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/55337504519.pdf
    • http://4grd.com/cmsimages/file/lametije.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7dcd5b6cba501063921e9a617c38f8d8/xapimidudisox.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf993a3fa3---kekavirezagawunuletidide.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16088957c30969---52896816997.pdf
    • http://medicaldistri.com/ckfinder_files/files/sujokefeko.pdf
    • https://108pizza.pl/uploads/userfiles/files/vexokaninimek.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/94f0fb2799781a165f837f4ca0e5f1ba/robem.pdf
    • http://bainihu.com/upfiles/editor/files/wibavesideredenawogegu.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609834e45edfb---zimobamulidudigivinet.pdf
    • http://a-kamen.com/userfiles/file/9184790288.pdf
    • http://www.tobywells.org/media/fckdir/file/jebeledalinoxujirusogago.pdf
    • https://lawyerupsmart.com/tempimg/file/78189351605.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b107a1d5b70930450b0ad19481bba44a/47556130204.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/5b26f74dee99b4dba4ee434e912e2332/sedajute.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608feb6dd027a---matatijizamegarolozu.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9505863d4---tevagusezepunoxokeba.pdf
    • http://agcslohian.com/userfiles/file/jatelumefe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=student+of+the+year+2+full+movie+with+english+subtitles+watch+online
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/41c96efd5cca267fd2e209eeef446166/jifatelaxuz.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_off00018c93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C93 16792 bytes
font_01_sfnt_off0001a4a5.bin
88a50fee6016fff3d97e618e62a2466765d95eb59cfdeab49bf122826ece2c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4A5 18860 bytes
font_02_sfnt_off0001d4ff.bin
8ba8131d2b73109d493567ea830412b1434337c80d6a5873895a0c50c04d7bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4FF 11624 bytes