Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd667c6c05022df…

MALICIOUS

PDF

79.7 KB Created: 2021-09-08 10:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1fd504fdf91be5a8ef16282ab4b2b1e6 SHA-1: 65f7337a07cdef6d3ed5b9ccdff8e0a305d890e8 SHA-256: afd667c6c05022df645736521c5233f06fb09e5d84a8aa952d09262fee33c0e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and numerous external links suggest a malicious intent, possibly to distribute further malware or engage in SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • 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://magendans.com/imagefiles/file/sebixugimobokuzozesagad.pdf In PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/3d9beae55cdd2c281fe61ad2354f127e/25344487787.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/voredexokukimad.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/3068071793.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/68555379309.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/gimifewesevusogur.pdfIn PDF document text
    • https://corghialberti.it/file/remiba.pdfIn PDF document text
    • http://rafaelokazakov.com/file/rilolo.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/bagegosugokozebito.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/84454820759.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/76963945908.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/rimizevugedixowolesidelu.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac68baa295---bobufega.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b851ec1dedd15f9df93393f3cb51cb70/vadoporagexobip.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/zujit.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16097f61133188---49175377407.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/wosonakewovuri.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/91566816064.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/gogigafizagoku.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/lexajalamodavosut.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/sutazenazasuniduzo.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/muzamuvudedubiborelanase.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16108401f3c9ce---65719474030.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/42788a45e99d11686876ea47ab66949b/36170137720.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/39304147156.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4c69315a4e33419f1b92e4960fd941af/29789150844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=oraciones+compuestas+subordinadas+ejercicios+pdfPDF 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_off0000cd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 11128 bytes
SHA-256: 02b59b3f4870573da395bd5032cece91115fc9233ffee3cd8d48940f4dee8083
font_01_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 19256 bytes
SHA-256: e9e208382c2a5eb2a0fc85ea2691161bbb05c2fc7d447a0d980f7ed42cf195b6

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