Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d2e740d27b17a0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-03 14:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eadef22dde884e9d40de43890b0fe810 SHA-1: 04d688bad9e4f4ecdc086a6ae8467914ecfae8b4 SHA-256: 20d2e740d27b17a0a9bf68778ba42ab2cff3d74c9535572fa1e98960c8b342c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely intended to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=nyc+hipaa+form+pdf PDF link annotation
    • https://czus-lukasa.sk/userfiles/file/90501662657.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c4e810d5b45ebd1f8a17560dcc66b6f5/23110596475.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/boworukatetikifirotelekip.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/f78m73dnkvglkb6utp6io77ne7/76904089245.pdfIn PDF document text
    • https://realschoolspirit.com/scauserfiles/files/nijiserurezogarabe.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/xudozawib.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/20271123149.pdfIn PDF document text
    • http://szwygs.com/upload/nuduxomitesetefoguvu.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114f66b42f17---70055169627.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/30230845640.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/57f5ffe6ea710e25fa181cd206aeceb4/tutemex.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/54538277742.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/sedesunukofumofesemum.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/zunopazipewamoxodunugug.pdfIn PDF document text
    • http://amdind.com/userfiles/file/53087880725.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/65626141973.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021072001483073499.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/90651674396.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/lidirasikajosijafazorena.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/5jk1ksaea24spv35a4813l4jcs/salumebezog.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a11c5480f---gitedipafanuzukogemu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/71a2af8b21a5799a2eec583193bc6648/69686666854.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113adb2555e0---5397611685.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/dapizegorarofuz.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/musegasoregijave.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_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 10428 bytes
SHA-256: f3a44abd7932f78da9bd56a1592a4d12f001acd5c80fca5ab9e6db153a97ec43
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 19360 bytes
SHA-256: 356f31f615d15d6258bd4be95a84d7c7d40f7c67128089d78b46392e096f1fa3
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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