Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2460918aa8018c4…

MALICIOUS

PDF

89.3 KB Created: 2021-08-04 15:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2c10ca4cb25bf6f543489cc173fb39b4 SHA-1: a587f0c3e350e59d3c496e69cfe56ff66f872de3 SHA-256: d2460918aa8018c4d553a01bc4d2ce8ff9bdd58913642b4d8a8296596a1dadf6
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of a 'download' button lure further supports this, though no specific script was extracted to detail payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aarogyamedico.com/userfiles/file/ditonasiwoxirusavobidi.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd776ad3d2---wixenemeluzelop.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609414e1eb3d5---fojuwinufozebij.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/8b1d34c5151f45497c1d4d051694056d/ratomisirasesebobovuditer.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2f6deecdfd9e09f33d225789ae13ed8/51467475296.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e009f3bed---tiwezokisiwaxefasotuweja.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/3944061259.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/88566274701.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/tidisizivakekila.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/84882236848.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/1e5fbe053e4a0941ac2251d2ec11911b/10084762169.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/64972559636.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/xisuvolelotumogobugejuso.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/65097766662.pdfIn PDF document text
    • https://agermag.ro/mm/file/mirinokinebe.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vuroruzu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa2ecf291---sozabujawaxoxototiv.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109cd70a7942---74291607719.pdfIn PDF document text
    • http://suleymanporoy.com/img/userfiles/files/96174884575.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207608e145---kuzerivexopigizum.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b86865663---lukeb.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/96362117769.pdfIn PDF document text
    • https://cecprint.com/images/file/xeberixeboguzorufiwalur.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/loxowudol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=garfield+2+full+movie+in+tamil+hd+download+tamilrockersPDF 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_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 11244 bytes
SHA-256: 126352ad33bedeb8a00f18418b5bd04fb346f62d58ed05184f26c18e7b28da39
font_01_sfnt_off0001111c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001292e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292E 17232 bytes
SHA-256: 6d277fe9ae5c7745813d718462bea18fbd9f2d24b13900dee945e69fd5523ffd