Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e423a30d625431…

MALICIOUS

PDF

88.1 KB Created: 2021-06-29 18:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 33394cb5aae9aa4975f5b04ec395becf SHA-1: 1ca7616a4f7c0ddb6407bfd8bc546f9974d427fc SHA-256: e5e423a30d625431e8b09bddb47ff48f6a27892471fc79248d36cb58394cd641
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=soccer+13+results+and+payouts+yesterday PDF link annotation
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c34a4d58859---jusavolidavaletosap.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/pji8hrbjdqhnv8g4jttpuie3i9/96503834035.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3d5f81532---jurezazugitura.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/0e0fbcd67001e4bf2b87c546ca343284/36170724053.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/1e0a46fda9d6867bea656f43dc7d1563/88171132044.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/4a53172029d0dbfd42b643538501d276/5304405130.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c904a15ceee---wipukupakuvixulavimet.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/9145821070.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/69615469f1e8778bfb0359e3a01df3a1/xuvubel.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/bowilituxowujujina.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c695c38f91c7802636a013b82bf9279c/3621670895.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bb97e8cc11b---tejuzogurapodopodebex.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a1f918fab---75437779642.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/rilonewi.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6c9e1bdd826b5887a07ec64118cba036/60253784030.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/79104181187.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/219ffb99213a1898f37148d6f149c563/60397108367.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/nipevumozobupijen.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f8329489df7662de6a10a28df991521f/vonisidavuforojaki.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/b3ed2c4517e7331c65cef38e7b716666/jumefozavelumufef.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/7c4b5d16f135863f4c605e9dfd5bfe32/lidiwoloviritijoki.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/b8dbe79477c95cd25dfcb20dac59324b/72156012107.pdfIn PDF document text
    • http://asustainable.com/global/file/11738101545.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/zesup.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_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 16960 bytes
SHA-256: 20ec02dca86bbabeb4c5525ae0997020c5b936ee7b5ed563f19d7b8f4216986b
font_01_sfnt_off00012174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 10928 bytes
SHA-256: 911785213944b866af5d8985a91839722562b4ba636369f120712ef43b50dd10
font_02_sfnt_off00013b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1