Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e7e382aa922f94…

MALICIOUS

PDF

92.0 KB Created: 2021-07-06 21:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7a38ac3864138df43fb886f1157e10a SHA-1: 7ce609a192ae0d34759d147e65f881400e4b896d SHA-256: e0e7e382aa922f94216eefae12b97c43ec5dd4e5902dfe7389e2278693dff503
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7555a04a77---gorujadaliwezusezi.pdf
    • https://dnmpaint.com/sdcc/images/file/girarujiwe.pdf
    • http://ahchala.com/img/file/65349932720.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e05301c0b---53569904468.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f8d942bc---kuwanen.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913672cff91---zuvala.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/bapaniguraturatefezuwe.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfece836f71---59036251870.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/28328381894.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b6baf2cdcf7---47642973682.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/k1q6sasib530dtl2opmes08ha9/26563634486.pdf
    • http://adhdesign.de/userContent/files/20210609042608-tapevikafukoro.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/2a37bdd4f04f7e96c5557057442dd6fc/27590041425.pdf
    • https://kaptenhoki.com/contents//files/sawazitefaxepezom.pdf
    • http://bwc.lt/i/67659574894.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/0rrm580ffs11jvsrafe6b34ss0/11826196417.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799a65c0d4d---1668295008.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918aa84001b---8463984697.pdf
    • http://teresachild.com/upload/files/95162639475.pdf
    • http://epoch-making.jp/js/upload/files/94004869231.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c55cc207d3---navexobig.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c140658048---48309764717.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9d152d30---36899424984.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff271faf8---70026994520.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=popping+hip+hop+dance+style
    • 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_off0001058d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 16792 bytes
font_01_sfnt_off00011da4.bin
b207957b619565fa1f67958a753e418ddacd704298361a4e991050cd30b82f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 10808 bytes
font_02_sfnt_off0001364c.bin
c14168cc7d6c0d4adf3ad8a8b063c4e333919d85946ad20aadfccae068feb632
pdf-font-stream PDF embedded font (sfnt) at offset 0x1364C 17108 bytes