Malicious PDF — malware analysis report

Static analysis result for SHA-256 b939ced4a8406ff4…

MALICIOUS

PDF

84.1 KB Created: 2021-09-12 06:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 27f464300338bec19e323a33ff4fb7f2 SHA-1: efdfcc5feb4c4c0f059e30c9fa600727a5f42dd5 SHA-256: b939ced4a8406ff4bd3fcf647f5fe6eb176bb6b9b5640476517b64f3b46ed126
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=juegos+rpg+para+android+2016 PDF link annotation
    • http://clarksville.net/wysiwygfiles/file/niralunederodagisiwivoveb.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/99625402884.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/64119027409.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/9831921134.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/50209154721.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/35557588864.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/62318825567.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/fovoped.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/28117618246.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa761e87f---86992844222.pdfIn PDF document text
    • http://floramarble.com/uploads/xijivawili.pdfIn PDF document text
    • http://grafitym.kz/files/file/mokegu.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/44434324865.pdfIn PDF document text
    • https://magatek.com/documents/file/6646346359.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210906030736.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/tojikakalebirebiwot.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/90721725287.pdfIn PDF document text
    • http://iphysiology.ru/upload/lotetatigif.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/sosibelegejejaponopone.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/54081093737.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/81407246392.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/xajufafifolitotoluzi.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/80367030211.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/kupovujofamu.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_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 19056 bytes
SHA-256: eba733734de434d11e87a127d897c300cbf97dfc1c73652f69ba98014226e954
font_01_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 10976 bytes
SHA-256: 83f7951fb023346537ea6c5f1cfbccb5209158efd102efbdd745b27c064186b8

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