Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ad14216a9ecba4…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 19:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e077b2ccecd51cbcf7948a06cb7be510 SHA-1: 0bf85783e923753b38d8dfb0137b3f5b1f86510d SHA-256: e9ad14216a9ecba45f13ce1f2ee6107943c4ec97f070ea9cc0fbfb38aec00667
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7745

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://encoyun.com/calisma2/files/uploads/rabuvabelikewobe.pdf In PDF document text
    • http://cutyoursupport.com/userfiles/file/67338285736.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9155eefcd---movibakazu.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/14696222543.pdfIn PDF document text
    • http://shevtsov-art.com/uploads/files/fexuxepivulo.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/limegiderunozetutixog.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29337275397.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/jijenuzemopujafifepek.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/30925572155.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/10565012356.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/181125053661353a715bf17.pdfIn PDF document text
    • http://sciattella.net/images/file/42358352592.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/wajozedufafog.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/021731579582.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/34afd451957ef9438b339eaf0e1783c4/sekug.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/zomividibejareb.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/tivugeduvatunenemovagilos.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/97259726889.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/18047253901.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/gizuvi.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/14686904895.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/jivufajexebitimut.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/62461332275.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/zojukidop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=call+history+apk+downloadPDF link annotation
    • https://lapdonline.org/file/45877762183.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_off0000d462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD462 10680 bytes
SHA-256: 12bfe1321d5374281f5fb3fb56d703052dcccca668af9fcc61ba0002ce34b447
font_01_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 18148 bytes
SHA-256: a5b8bfd17d79e1c1c02e1e98ee71f4a51b8e1401a7b621d600d35c0fe6c3ff38

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