Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ce6d9949cbbdd2…

MALICIOUS

PDF

78.7 KB Created: 2021-08-26 19:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: fde6cddaf86760b00905db7fd0517619 SHA-1: b3a0e212f4e3ad6bc6e8c183fad37206f95e8e0f SHA-256: 11ce6d9949cbbdd2a618551639f39ac20c0dfc7ffc70fccecccf21079ed4a211
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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.
  • 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 http://ppogrimall.com/upload/editor_image/file/burasisesediwefuwigemupig.pdf In PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fce56ca186e---92575427403.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d346888002b007c57d18810a43564b74/89861430772.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef883a74e7---belamixovawaxadowizukog.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e3283d1f---kemewegedogoz.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/62788061776.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qvtgg78219pbg5nnkdsbt0v6mg/53784773275.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/12770176415.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/fidusisetezepanezudilef.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/nowipejidafon.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608204652a6e9---32465222472.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/xubaf.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89614bc33f---83109108651.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b3e45dd72d95fef94785ade2699fd32b/10664163986.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/65051867093.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/c750062d24843a50d70aada65304013c/34761876560.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/5273058214.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608432b781f45---nerewulobitekawajomesira.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/guropojogexanavi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6b439e2a0---36281012683.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161270d806e532---fokujedovilisuzenit.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/36288340676.pdfIn PDF document text
    • https://vestol.bg/files/file/janumalawo.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/zikaxola.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/setesesiworesu.pdfIn PDF document text
    • https://artbynela.com/uploads/file/pavubosu.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5690e5bd61---pipilefofupas.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076c7ee2c371---35993518495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+does+nirvana+cross+doPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD277 10480 bytes
SHA-256: 288547a4d328718455e1b722d6a20abada63780ac6dd6508fff25f3977511ad7
font_01_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 16632 bytes
SHA-256: 388a4f04581210201b8c7e21a6e5e679101d799c64905f28280c4795d6de163b
font_02_sfnt_off00011539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.