Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f44846c077170b…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 23:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd520efc6db0a20069c7a6a6def1e1a1 SHA-1: f06297b076662da713ec835f4198c32efc67478e SHA-256: 68f44846c077170b22d6de990d3977156054d17942c885ca4a622e1070e45fc7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm PDF. It contains numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious content. The presence of embedded URLs and the PDF's structure indicate it is likely used as a lure to initiate a phishing attack or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

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 https://laborke.ru/uplcv?utm_term=best+android+auto+clicker PDF link annotation
    • http://sinoscaform.com/upload/ckimg/files/202109120235013899.pdfIn PDF document text
    • http://midospa.com/upload/files/zaduxujudi.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/60864711670.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/fomenepufuzozozat.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/pevawumepiwedu.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348c7d81435---12992607105.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/24095120022.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/muwaxuzifugutibar.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/140666c04a35dc267e3425a4c470d3bb/nawobadabaguparexirixozo.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/nevejevemetitow.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/43728191195.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/niwamibevu.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/15582580253.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/61805293697.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/4725309172.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/jogivisexefes.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/gakejelodiburivagibexolo.pdfIn PDF document text
    • http://wdnederland.nl/file/61036499706.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/kemewos.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/94528229684.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/wejuposulirakafeso.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/61557179258.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/52360715503.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/44035817202.pdfIn PDF document text
    • 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_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 10608 bytes
SHA-256: 7a6a3d16e4b4395bcd1521d5bfa06442338efaf2d610d51748002b0e48f67c01

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