Malicious PDF — malware analysis report

Static analysis result for SHA-256 f620cf7c8ee0384a…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 00:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e6bf3937d05f98e8f363938ac341cb4 SHA-1: a4637d294d7b6e19f1f85ac7c77a6995d3116acf SHA-256: f620cf7c8ee0384ab0deffc21441551914ac0679dae21131a7716a6082963be0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to external, potentially malicious, websites through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bean2beenefamilytree.com/clients/60578/File/28863138561.pdf In PDF document text
    • http://sjar-tech.com/uploadfile/file///2021051719471273.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/3115468911.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16129dfac7938c---dawul.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/4fd18d7acf73bca3d07fe709d94c5124/watoluxabavilijono.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bf182812707---nexibuj.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d611fd7b48---lekirejolujibawal.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b8fd1e56d---riwovenene.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/73221266813.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/v1399764brv44p78999v6d0773/gelomutusukelo.pdfIn PDF document text
    • http://imi.vc/upload/files/tiwuwilinopositi.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/semavev.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2160730f35c08959b91859dc60e0d225/59392629869.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608c901d3a194---jemifumisedokobiwinaz.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769336ba8fd---gibigowibozixa.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160801f90d8383---wevov.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/tagudiwepebeverol.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9b8056ab---71988433473.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/vonezosuwugudawujiniguf.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/38003942208.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/15616819100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=factor+tree+of+8PDF link annotation
    • 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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 10104 bytes
SHA-256: 41b3840b1e942a267996f79603dd2fd262bacd0f06fe376cac37d39d17b1c343
font_02_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 16552 bytes
SHA-256: 3d85bf1d3eabc46f64ef535c783cf9ab73f53993dcbd3e7d1519e86ed4962d90

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