Malicious PDF — malware analysis report

Static analysis result for SHA-256 49637b9f8d9eea17…

MALICIOUS

PDF

64.0 KB Created: 2021-09-18 01:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e358dc560490574df9a1c01afe662808 SHA-1: d244a4b113bc59adbdc11a1cedeebe0ad61baae6 SHA-256: 49637b9f8d9eea17b0c76e76bd95d745aa59090beb08f8c35f91ca84d4bae8f3
124 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm with numerous external URLs, suggesting it is used to redirect users to phishing sites or download further malware. The presence of many distinct hosts and UTM parameters in the URLs further supports its role as a distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9203

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://queure.ru/uplcv?utm_term=frozen+2+full+movie+online+putlocker PDF link annotation
    • http://i-akparat.kz/ckfinder/userfiles/files/wilujufemawefidevuvo.pdfIn PDF document text
    • http://aven.su/userfiles/file/xezikewijivexejopivoxe.pdfIn PDF document text
    • http://netart.hu/userfiles/file/mifusuwanumonutefo.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/21260067973.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/e0eb065282b1c1bec2a707cbfbe84ce8/zezezidi.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///zarepapipuwemu.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/13497543326.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/43784065349.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/54459004231.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/gejosavuxutebajotiluna.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/paferigiza.pdfIn PDF document text
    • https://12shio1.com/contents/files/39199004528.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/26877490409.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16da66a41---sisula.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/67301726820.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/68203644801.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/nugalasixa.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210906223120183.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/28994910180.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/33146146968.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/89911606792.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/minubedofifuzezivelime.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/49079686043.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/42819145900.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/95173041582.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 10724 bytes
SHA-256: 068ecd6ea8c064620c7dda99c983bb3d3d883270301caf95ab02d12113496b6a

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