Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5583b4aac0a5af…

MALICIOUS

PDF

71.0 KB Created: 2021-09-07 05:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 84c0cb0b7206d3dd519c285fd1077a5e SHA-1: cbd5d6963ac4786e35be98121a4d0c1638ceb619 SHA-256: 0b5583b4aac0a5af6fb862ca57eb611264137221789d7349d5b13967b6c76cd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=sat+vocabulary+quiz+pdf PDF link annotation
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/26120af78c2e29600f27e59470bc9fa4/pujafasedivopileb.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/kifujugufinul.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63be70767---22541688741.pdfIn PDF document text
    • https://unosms.us/userfiles/file/25814112067.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/xaxugabekinemopexixulekuk.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/20392736907.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7004f170c---33366376313.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/xulidewiwuwejuvigigup.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/nokopubesadubusot.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d68de9506bad01fa3b2377398971d8cc/90363658896.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161143081d8e9a---11829445482.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/2857aa4192e1066bdaf1fda6dcda4b41/3100047780.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f682c82d48---18320498029.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/xowalizu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090cba0dcdf5---68248173017.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/18cfea8mi6fc4n1cvii32u3q71/vulakul.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b48689ea7d38cf4b4f130bf233cf525a/jopakupuruwexolofisi.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/wabuxewotur.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62857230218.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/lesapulegavixeb.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/07b04ccb432f3ed1528c457936e84692/koxud.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/70806947782.pdfIn PDF document text
    • http://alkimosgb.com/userfiles/files/70927663047.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_off0000b659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 10908 bytes
SHA-256: 52a7bcf663e0a9bcbb6e3f5c269801b29db580f989a91416b80a8980252b6c29
font_02_sfnt_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 15268 bytes
SHA-256: 7383f86b33ad95c1a47d0244af475b54e08e8b9bcd674baf81a0427459ddd071

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