Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fccb4f4121c7a35…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 23:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 265d0a1f842a6778766fcbeab01b96a4 SHA-1: 50f58b9a7ef37efd74667fca9b054c988eaede0c SHA-256: 6fccb4f4121c7a35d2635b534dbe187a359ce7261c3cb9e089e71409e4a57b22
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics strongly suggests the document's purpose is to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.impactit.in/ckfinder/userfiles/files/wezenobajixak.pdf In PDF document text
    • http://morgancountyoh.com/userimages/2627613138.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210729164341.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/49457718106.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9b108f41cbd9e7c38d21df6659704e2a/19779764992.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/20873883115.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/raruxu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/v1mvc6bgmdq4c1qqauvubqlmme/tekosew.pdfIn PDF document text
    • http://altinay-law.com/images/file/2641300219.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/20/files/7199092675.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/wirugijotinam.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2f3c50b6---fowibisavopizokusit.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb27a08e0ee---sadenazaritowixa.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/jd3episcriq122pvioikejortp/luzijokitajumepiguwimased.pdfIn PDF document text
    • https://marosme.ro/hirek/file/6222390086.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210828224504.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7809db35b---94370423117.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210705185238.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/567456030.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gvmoda8nhrh9kc5m3v78f328no/tonadofatijumusamarixu.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d520591b---puvemup.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/kiposazizuzuvosopukur.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab41c420ae---1738033621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=english+literary+terms+pdfPDF 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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 19376 bytes
SHA-256: 9997a5cb0528826c29dc18eda6798f0865bb78626de7f065d68735d7e700af1f
font_01_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE5 10924 bytes
SHA-256: 283775bf9df3b1c2199d99ff7fcf8819cea24e3de8ed2ce9528dd275c8cfce8c

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