Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fda1c707666f3f…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 02:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6bafc9af0f49d1edf3ea0c02f41a4757 SHA-1: 9b4b0a008e17467fbf2dabca88c629621d25a35f SHA-256: 42fda1c707666f3f323903bf3cb53c30d2b335ff244fa18bc0be369b4feda411
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious or compromised sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://szolnokepul.hu/userfiles/file/63979967188.pdf In PDF document text
    • http://hyundaidongdo3s.com/images/files/70421493234.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/fifole.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/juripatufifuzifov.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610f44bf94ca6---xepigododufaxojavebigusi.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/wisawino.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/wegesaz.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c5fb2b3f0---mijifasoromububegilofojo.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/49687300634.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/10236075404.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/70639883933.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nebonadivajab.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/69853715792.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/21653292435.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/petifajogitaxila.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/tapuxarumewapetudawiku.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/56265495908.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077dd0eb2ce1---55145821277.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4627a8e1c1---jezofetufonegiditibidu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a499b0273---67601604561.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a28c69a0---35837787640.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/75544844057.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/mowazudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gender+and+human+rights+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_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 10916 bytes
SHA-256: 59689a756b1ee4fb2880d7402e8b148bdbba58fd8282168d8df39d8534b263bc
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 17672 bytes
SHA-256: 4e463013b05fb0f195801f9896f992fb322987df347492a8e2159b15f4d3d5e0
font_02_sfnt_off00012a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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