Malicious PDF — malware analysis report

Static analysis result for SHA-256 8393688d283334ec…

MALICIOUS

PDF

74.9 KB Created: 2021-09-15 19:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 539d8ee4a51b9340803c9910b406c1ea SHA-1: c1968154934be7cf51c232bb631d4721df74ed12 SHA-256: 8393688d283334ec9a3fd494fba6794adc3b3ef142ab4be1301954541342ea64
94 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to external sites. The PDF_URI heuristic specifically highlights a URL containing 'utm_term=world+of+dragon+nest+apk', suggesting a lure related to a game. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect the user to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=world+of+dragon+nest+apk PDF link annotation
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/57884324354.pdfIn PDF document text
    • http://www.siposferenc.hu/html/3421606164.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/lajasorepiporufe.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/kozusejopovorugoj.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/duviza.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/guwaxerumerakiwo.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/74661321782.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/renisedufogotamemomavex.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109062226017095.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/wojosiretulufofuperimopu.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/turelubipezidoroso.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/81478521658.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400a312965c---zowenez.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/tafodizexuk.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/57988424329.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/gapafivob.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/40518998183.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/takuvakeziwukoxagidit.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/14956304816.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210908001353134187poxfr.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/2936251365.pdfIn PDF document text
    • http://ty-int.com/files/files/wezenunofiwomijasisik.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/zorasezizoma.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/jitibisu.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/sigimegereze.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_off0000d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 10668 bytes
SHA-256: 180503cc02f6d69d42737b91b1765e910206a9da433b99d41b45526ef41fe174