Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc77224b620fbb19…

MALICIOUS

PDF

59.5 KB Created: 2021-09-26 02:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f89f67ddba8faa702fdfc52c7973af0c SHA-1: 2d2a313576326fe50c2fecfbafe086ed133b6d40 SHA-256: bc77224b620fbb19720de48ec66e7a8014f3292013ee362e8c0479b631421a08
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6644

Heuristics 4

  • 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
  • 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://medica-eg.com/userfiles/file/getevevapuxuzapumug.pdf In PDF document text
    • https://vanphongphamhienluong.com/upload/files/paduzafowoboxilisoje.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/23754794235.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/nepamim.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/83348859610.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/eeulftpt3r9dqfqubmsftedga3/raboziwipulo.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/rulibapowoxem.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/faguwigiko.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/37925875746.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/moweraxavoponig.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/19274807657.pdfIn PDF document text
    • http://totoumi.jp/upload/file/49276539510.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/63682383917.pdfIn PDF document text
    • https://longhoang.vn/upload/files/60278947770.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109030831217804.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/pejufopuxogem.pdfIn PDF document text
    • https://tekartltd.com/upload/files/nogezigoloxuba.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/luradovesazuzaxaj.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/sokolejikow.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614fa242ca554---rudaf.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/xekugutujonodejevefa.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/gaxosumolide.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/81401050726.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/94192434290.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=icd+10+tabular+list+2020+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3A 10744 bytes
SHA-256: 8b6c9e00f10a12cab319f49af735853f198fe40b693065d3f96696d4f4d57fae
font_01_sfnt_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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