Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8602e2a95b236a7…

MALICIOUS

PDF

83.9 KB Created: 2021-06-25 14:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d05f4daa82ffcc56141ff6227aace64f SHA-1: e50a2eb19cbbbd55fd869aca3a28bb26250b6be9 SHA-256: d8602e2a95b236a7762ddc2f4db6090b1b4740a602b8f9a993811687d0eacfc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or SEO spam. The presence of multiple links and the nature of the hosting suggest an attempt to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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 http://rauvuonsach.com/images/uploads/files/11409841166.pdf
    • https://alamansyria.com/userfiles/file/baxazufakulukev.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c724cafe3c---fimabumetizax.pdf
    • http://centralgiving.com/media/userfiles/file/tujejiwemovinexat.pdf
    • http://jechtinger-wein.com/jechtingen/files/jakasakixo.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc95d256fe---89233977374.pdf
    • http://renovfab-menuiserie.com/userfiles/file/2002144208.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160705a9e0f0ba---zigogesu.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b14b189343a---muweg.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/5714085751.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083864cc810b---35320873154.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//mitojogumegesa.pdf
    • http://dzstock.com/Upfiles/file/xusofatefiduterugeza.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/ee88e07966547a52f1533823df86e958/zafukeriv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=leadership+strengths+examples
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f1.bin
e967008224feac553e1167a874df0d656dfc0ec751ed1108b6dfd628cfd9d719		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 17756 bytes
font_01_sfnt_off0001126d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126D 16792 bytes
font_02_sfnt_off00012a84.bin
d3ed8a6cf9bb7ffc9bf1766a778252123f9502323d1f1b5317b30e426b335cfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A84 10776 bytes

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