Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1256ffee305ed57…

MALICIOUS

PDF

82.6 KB Created: 2021-07-15 12:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e65b44ad22f879e504c57d4c0afb403a SHA-1: fecf7983f9ca2a1e7e99a8dda5eba513878627b6 SHA-256: e1256ffee305ed57969539625f3616facae0196e7224345d832cff43fff835ca
196 Risk Score

Malware Insights

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

The sample is a PDF document that utilizes a link farm to host malicious PDFs, masquerading as a lottery or parcel delivery notification. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates an advance-fee fraud scheme. The embedded URLs and the nature of the heuristics suggest the document's primary purpose is to trick users into downloading further malicious content, likely for financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://inwebjor.ru/uplcv?utm_term=how+to+set+up+powerpoint+slideshow
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd8f56c0a---guwosurezoxopuxitevod.pdf
    • http://bajcsidavidfoto.com/_user/file/zoxijufoxupobe.pdf
    • http://awkontrakt.pl/ckfinder/userfiles/files/metilumesusa.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/23bbbbbf786f4f24201493799b3cfe93/momabasabazarakaja.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d2eb4402---beriwavovusijukik.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a331d10481b---narogadovigufawufonanazon.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160efd7970fd77---tisew.pdf
    • http://brandnewgoods.net/userfiles/file/bupajuferoxuwi.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/nupurawuludoxijew.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf38cd7c15---25028331043.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9df3326b---resev.pdf
    • https://abandassociates.com/ckfinder/userfiles/files/54055654133.pdf
    • http://giustizianuova.it/userfiles/file/23636663938.pdf
    • http://sanmargholidays.com/ckfinder/userfiles/files/xedetufebekob.pdf
    • http://maremio.ru/admin/ckfinder/userfiles/files/felawinewuwegigado.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/nibomonekun.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5e08f0cd---43757985394.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/2007340dfb3d8c1789477d26375d5c4b/tilazogixawonipijem.pdf
    • https://gamepinleri.com/calisma2/files/uploads/purivewup.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b436d6f2136---1765381199.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_off0000e1ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 16792 bytes
font_01_sfnt_off0000f9ff.bin
99d1a29c84a2cb1058d2314b38b7ce9798a3d10908161464575eade1cfafd1e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 16632 bytes
font_02_sfnt_off00012567.bin
efac3040586d2fd7123629a92c55f28d4b0654ec71cfa77d1eb4c9e5d5100b48
pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 10504 bytes