Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36deea1065c2803…

MALICIOUS

PDF

86.7 KB Created: 2021-07-02 11:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f18125e5957b316822319aa21df1e8db SHA-1: a7d438a321155726c936995faca8c3d95c52d0cb SHA-256: e36deea1065c280386efb5277ab4f8a322a77ebe503a3808bc1a75a853f687ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to mislead users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • 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.
  • 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://thegioibaobicarton.com/Images_upload/files/xuvepexu.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/58596180264.pdf
    • https://service-panev.com/userfiles/38040021569.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/e74inc9qg18f37cusjqj4a9lqv/gumikaletobapobogu.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/13618fca619812868a97f717b559ca75/retulaxememekisi.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/c8feebf5bccd3a771bcc7b63a45b8ade/xuzizazuradowekulililitol.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ba8e2f3c4---lupagowuwiwiza.pdf
    • https://tappowine.com/file/39260868307.pdf
    • http://alpha-th.com/userfiles/file/gezuzowadenarabazutedili.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e231be48552138a7c5f8af3e76dd9eb1/47729529491.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f12baa674---megoka.pdf
    • http://nanobubblevietnam.com/uploads/userfiles/file/rubisosekukimovovate.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43f148259---85952249034.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa299077fb---vovafaxovexixo.pdf
    • http://timnhanhonline.vn/upload/files/91858381464.pdf
    • https://uniqrelation.com/userfiles/file/41174559707.pdf
    • https://censcakmu.org/board/file/files/raramizupitosujewurote.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0806a222e9---86683931115.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/6295b697a9c0a54a0275dfcbaa64ae12/21508375034.pdf
    • http://timeyear-v.com/userfiles/file/kukukerazavinagewazuvig.pdf
    • https://watertorens.nl/userfiles/file/gatinodukizevozupalux.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160817c561c626---83684495709.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/c67ab8a645861053dd73305a086f10c2/50501349169.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/oidtjt8idq6dd5ghqh9q5d3uac/18702788981.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ffc64559bfc8fc5a96155833a02cbc65/19463778431.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/v1onu6jfdfkvpujt4ol8b5qqp3/kutukikejujok.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=list+five+characteristics+by+which+compounds+can+be+distinguished+from+mixtures
    • 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_off0000eccb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 16792 bytes
font_01_sfnt_off000104e2.bin
25973560c49cac25444bfd57d27ef49a98cdaf6365232c64b2cfae05c3d50137
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 11588 bytes
font_02_sfnt_off00011fe5.bin
df8d8a57d7ff584cfef929b15536794d98cff5a4b0a2a1adeac23088b8eea7c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 16996 bytes