Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a962a8b29a669bf…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 22:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 71da048fe01543f981df4644bb812661 SHA-1: a833377c1127b190b653d1716522bb7e8c3d6b12 SHA-256: 0a962a8b29a669bf88960a091968773fbf0c5987c50878c42db69fc297fa21f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains or point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further payloads via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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
  • 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://crysiq.ru/uplcv?utm_term=spider+man+movie+123 PDF link annotation
    • https://behagi.eus/files/galeria/files/45968083432.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/83425855335.pdfIn PDF document text
    • https://12shio4.com/contents/files/davunadapega.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/93ca98f750ae5e763c52425234cceb7d/tatekebanom.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/zesewewuxuturagiloxapita.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/88583557465.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/sakimev.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/6400661980.pdfIn PDF document text
    • http://rilta.net/userfiles/files/puxatepek.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/38446205543.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/54075968628.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/vibawufiva.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/mitoxifejagedezorajipiker.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d28d64eb8---92907069916.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/libemedoxomarasu.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cplma0m2tt5ll3f6hc0mq0q13e/muwuxazatiku.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/tabuloduwasaw.pdfIn PDF document text
    • http://decorstore.eu/upload/file/vukalakokarobixuf.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/92701849719.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f716a20083---xidibebajufox.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/julivuz.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/12191955555.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/64854054856.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/sokapiga.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_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 10728 bytes
SHA-256: 7a2bfb26d7d33ae41551b9b4394fcf0c09f82dcf077346f031beac3f0d968109
font_01_sfnt_off00010087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10087 19224 bytes
SHA-256: 4735754cfdea468671a3b7bd5f007cfa6a9f707c76d21b6e9cc67d86680c2284
font_02_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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