Malicious PDF — malware analysis report

Static analysis result for SHA-256 84724b842b921359…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 11:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6495dc959cd44b6c788937182cb9742d SHA-1: ab01c10b4c8c878b3237448545a51c3c32880588 SHA-256: 84724b842b921359f005ea8f708650a9a9f04bd4d3fd99b35a9bb4cf4fc844fc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous external URLs indicate a likely phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these external sites, which are designed to lure users into downloading further malicious content or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4647

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=pet+master+apk+download PDF link annotation
    • http://lukinserv.hu/file/nokukotawib.pdfIn PDF document text
    • https://cubic.is/userfiles/file/64289423064.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/bapekifusejilexuwave.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/rulawuxoratun.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/jeboxetuxivigawejenovo.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/rilidawoletifejotatasi.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/mijofe.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/26986681411.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/buwibazozavovafiwuka.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/13913015377.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/39461023503.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16148831b11f6a---7604987136.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/9550214631.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jf4gla072dd3g2cqci9lfvdno3/livisakakopalopiva.pdfIn PDF document text
    • https://vinasimex.com/uploads/file/81931175530.pdfIn PDF document text
    • http://schokobrunnen.com/idata/duzujubeluzizunuremen.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/gikunazimagakalisu.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/65029488657.pdfIn PDF document text
    • http://markone-tools.com/upload/files/dawinopunanuvolesunij.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/tibinofapa.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/43897211621.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/53243839069.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/wazorapunuronu.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/38074529330.pdfIn PDF document text
    • http://ranchobg.com/img/file/sufenefa.pdfIn 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_off0000be29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 10640 bytes
SHA-256: 7d0fc666144e027f9421d1e82b65bb796159b1282eaf80d66f3f3945059ca655
font_02_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 19324 bytes
SHA-256: 8825b03753139016acef3686abd22425a145ba0f1ea4476cc8623ebe15a828cf