Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5236aa569c6f6f4…

MALICIOUS

PDF

72.0 KB Created: 2021-09-08 12:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9347581ba42328ed02dcd461141cb9c1 SHA-1: b410df0991565d63ed048101aadd7ca6d3d57175 SHA-256: d5236aa569c6f6f44a18e6ac1f856eb3c4cb930ac5456f1fb679db47f82be622
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://oniceh.ru/uplcv?utm_term=codification+of+materials+pdf PDF link annotation
    • https://agatanorek.com/files/file/6557494331.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fd55ae546131fc37e22cc5429a28458/80866187139.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/47776376367.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161191b4947ccb---68502263427.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608211c783dba---66823653919.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/xoxulezoketesuz.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4a232137524e354e77e644585c09a8c1/34084324369.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gijeritod.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/keriribozurubigido.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/kulizotovekulepopafafeli.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b492e270dca70fa3ee193986da023c47/50215883197.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3f12e86b3446078bd776be7050f8be29/dolapivi.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/841181c27d42d791b30102922047fc49/kopuxokisexivavadojo.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/gebibatelumatigox.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/zudokipil.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6e9432db---92867974744.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/lojefaxakobisa.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/zofigusupidomejegugixof.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/wabokadusipufita.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343e261d95d---89941957294.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/xunisuvogufopananewexagak.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/7790588176.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/nepoladije.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/93786038676.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 16936 bytes
SHA-256: ff683beb5fdec8cf969b5c0964a784989603ff0ec7f2440bc5815db8a1e4b736
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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