Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea1f295c98ee459…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 16:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fe3735eaf7ecaf4556dc0b310693f0e0 SHA-1: f9a80920592d46373c490611202da8cc6799b809 SHA-256: cea1f295c98ee459ee01f37d8a719b2db1e66466dfccfa61c1652311dbdccd89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs and link farms hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of directing users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 https://coretry.ru/uplcv?utm_term=daily+geography+grade+4+pdf PDF link annotation
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9536c06fbb1c9cd51b6119513606717c/25186056177.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a215bf95785119a04179adb0cfdd38d7/votaberafurubukexedusu.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4578618930.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/g9r7diutu2kdt3ep4pfjbtbrnr/98623284751.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/44558182648.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/gapabedevopanu.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/bazimuwufofutivotopijumop.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/68959888251.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/xigobabilaviwuvefawo.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/45061938952.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afed976ccc7---momitiparukujaj.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a9cf54c13---92193582258.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/lubimowuj.pdfIn PDF document text
    • http://ahchala.com/img/file/29870312987.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/85884015300.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/31373608230.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gsb4ql9sf3h18vbfcffj1mmgn9/japodepaba.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/lufafoxerewudegatanizuru.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2d0207fcfd5b0fc91f6c2be333e6b614/rolodezizuz.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d2b3ede3fcb7170784d53a6f9eb0a587/50808845130.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/50246923883.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b012b62759---webatavot.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/majexav.pdfIn PDF document text
    • 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_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 16832 bytes
SHA-256: b3a51c52c20905211d18e8674a942d533d36c3ba23932a134bf49146466fa065
font_01_sfnt_off00011504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1B 10600 bytes
SHA-256: 4dceb7e2694038af3b2e4f9a0f4f365107c3f5faae6d8695f5a20b5e2b8e7865

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