Malicious PDF — malware analysis report

Static analysis result for SHA-256 9242c99c194f913a…

MALICIOUS

PDF

87.1 KB Created: 2021-09-02 05:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8d9c87b9db1aefb24151e33b89edae97 SHA-1: 2681bbda8f953414b03a499cf37bc68501c866af SHA-256: 9242c99c194f913a8e5a777ef295b8b599c6211ef7c97f5fb18b4d509573180b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress uploads, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://queure.ru/uplcv?utm_term=even+a+broken+clock+is+right+twice PDF link annotation
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a15125e65---vomurelexe.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/1lod39kk16gcqbibfirqeeen7t/14172844439.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/26074894481.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/45542642989.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/95249879827.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/15001756242.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/95929758419.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/69753043318.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/77415247009.pdfIn PDF document text
    • http://dogable.de/userfiles/file/rivanu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6903881f87---7385065628.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/12796040945.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/95348575488.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e821e06acd9---71578468445.pdfIn PDF document text
    • http://silver1979.com/upload/file/54143359719.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adf139e70d4---96113534328.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/9umij6n7e3275gij1943a91dk8/36839210193.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/l0cm8fmtqrjab1m8tlschgdlj4/86014997167.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/nipexafe.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/67513772165.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/im4nbsv33fo6nb0vdckpaeset7/tewunitobisexiro.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/geruk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10876 bytes
SHA-256: 7bdba14db5e92cdc11d8e82ffd28ee0260e7c28a431162583f9d97295daa0038
font_01_sfnt_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADB 20064 bytes
SHA-256: bb5e35f63a17f1139d57460ffa1f4236f4c0f7a3fe9d90a2e5e05cc7ecce1865

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