Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebce02ba4df1124…

MALICIOUS

PDF

74.4 KB Created: 2021-09-20 07:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dba4e9c57aa06249c01f6f7e3101028c SHA-1: 2669fa7d6de4288afdeb3fe6fbaadba20ab422f2 SHA-256: 6ebce02ba4df112468c030221b561c501052b34a1a50ce772c7222f889371b74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://embody.box8websites.com/ckfinder/userfiles/files/34487998328.pdf In PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/vivimoruketometepezufi.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/kizasopataraxesiropebe.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5134118b0---72686060261.pdfIn PDF document text
    • http://potya.com/9388889553.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/70642339350.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/17428998078.pdfIn PDF document text
    • https://asiapharma.la/files/files/megos.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/pc7qaogj715mingphev445teuq/rakiguja.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/vewigoguviv.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/bilinekaratopotufatizule.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/95852974658.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/51323824227.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/70598601456.pdfIn PDF document text
    • http://mobilenmr.com/files/files/toles.pdfIn PDF document text
    • https://wonkingchina.com/d/files/fetuvarawigovusuzelavug.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef691cdc26---80933448689.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210919071841.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/jaxawezomima.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/basuwojomej.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/38928786433.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/kusizanexonalu.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/guzavelasutefigij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=andy+call+recorder+unhide+codePDF 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_off0000baf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF9 19272 bytes
SHA-256: 04b951860dfd1e8054a71cc7ad43fafb6b9ed7faa768ff11be77d28ee87c5c33
font_01_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 10396 bytes
SHA-256: 3d32d631d9ecfdf6bd872d035b4179bdfe51a6cf6cb125f302a31f98b15d8b56
font_02_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1