Malicious PDF — malware analysis report

Static analysis result for SHA-256 f085a954f1c226f9…

MALICIOUS

PDF

90.3 KB Created: 2021-07-26 04:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f1fdd8dd53654dda9b4cd322335d9115 SHA-1: d02051b81ed7f70222560ef59524895c1a38df31 SHA-256: f085a954f1c226f903e641b101a8a5140d3bddbbf58893cfa0dc2f79fb45d43c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://industrialdevices.in/uploads/80361108747.pdf In PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffa3760a4---51269874906.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/47ba610510ebe6788e2cc67857cb2cb5/puzatefasu.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d401b485d---73126706496.pdfIn PDF document text
    • http://cocoal.com/uploads/file/jutogoxadikotam.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/95174829375.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/57185568415.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8f1617c1---13597812640.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089a7dc10a8e---pimipoxajivetakizovufe.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/70447198959.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/xopekinonoxosafixikip.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/63234889694.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/h4qq3q6rvdd8ldfekhqkke874f/wabetuzepinenugekijuduf.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/63255028676.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/50af03f5f138e42b64b3d36d7ef94e5c/76674119070.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/nukud.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160853f3726ef8---9118571699.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/tia2t0vevj6l38qef4h9af6697/44749143971.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee363fd93ac---88792838192.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/6116f37133aee515480b476e5a5ea676/rakofimilojefavimujisa.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f32c8ee99f2---12436234858.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/rozokogane.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd091a32c2---nifeve.pdfIn PDF document text
    • http://iwishop.hu/file/mofamaxewoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=function+operations+and+composition+coloring+worksheet+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_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 11324 bytes
SHA-256: fc890b75590279360b645aa49dc91dded9f51a3f10f29de407a845066a5e0565
font_01_sfnt_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 17872 bytes
SHA-256: b8be27b4031222ca3f0716ea7ca50628c9f4c239ccc8cc3f210e466a31705b86
font_02_sfnt_off000142ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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