Malicious PDF — malware analysis report

Static analysis result for SHA-256 d230b0a07a1fceac…

MALICIOUS

PDF

86.4 KB Created: 2021-09-20 04:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 13843380acc9986203f35a690e531b64 SHA-1: 5e12aea032c6624c56a477356915aaaa8f504927 SHA-256: d230b0a07a1fceac07b20ae8c8fea93f1ce50114e03937342ba67107d8207007
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs that form a link farm, pointing to compromised WordPress sites and other disposable hosting. These links likely serve as redirects to phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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
  • 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://wastran.ru/uplcv?utm_term=one+piece+icons+for+android PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ce4cc4ca22d0c1def18e1d74fb9b261a/54981080465.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/guzewezam.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/21908480615.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/99498845902.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/taguxokipotuzenemekade.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/tejifatesinajujawosofi.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/78131279445.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/jaxafosizuwupipumesogugew.pdfIn PDF document text
    • https://nasikampung.info/contents/files/65283657772.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390b43535b1---wizatamavedo.pdfIn PDF document text
    • http://clingac.com/d/files/wudolo.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/33638758213.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/difozodejifufapupixe.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/83651288721.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/33293173024.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/25982443312.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/pomabo.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1632032560.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210905_100118_4500.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/wokupejofarotozepefer.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161305e2421f4b---29440745871.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614288b35e728---bobuzamedidinulawo.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/81366018911.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/bofelolomuwusifusoso.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_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 10496 bytes
SHA-256: 5d288ebb8f4d3ef41b0e330f8cb0a8634cca05dd289d6b44d7a7b16305b18f91
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 18868 bytes
SHA-256: 1b8817494c30fe0d150d67bb4e8fc22ff1e834605507282b73899e9c1d32dc90

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