Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d7d07c6d7dbffd…

MALICIOUS

PDF

62.3 KB Created: 2021-09-09 15:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7c6e4e087192cd0b3d8a77e235edfaba SHA-1: 66a89a18586361b84a29423f31f156877def494c SHA-256: e8d7d07c6d7dbffd4dbaa98173be4deb43ccaec7569ff8328d85d2f5b6aa317b
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm, a common technique for distributing malicious content or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6064

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://nayyaralidada.net/alpha/ckfinder/userfiles/files/47164637756.pdf In PDF document text
    • http://futimisdev.com/userfiles/file/bipupavodumekuguro.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/77303107762.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/85212468156.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f6179c5de874348f130f3fc8f5dce77/37680954067.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/sulowaloputixafozegeko.pdfIn PDF document text
    • http://baove24h.info/upload/files/39191912107.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/92551666780.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/54303497398.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210906032918.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/39101276254.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/98340353793.pdfIn PDF document text
    • https://webrobogo.hu/kepek/20829290237.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/nimele.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/wekusavolexabu.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/38841039553.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/wurarab.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/fipurixuxasosivum.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/49209064207.pdfIn PDF document text
    • https://kar360.com/resimler/files/ziwoxigotaxobom.pdfIn PDF document text
    • https://mimpishio.com/contents/files/22141319633.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/jamojiwovajoxajebiva.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/xojorilududuxaxejogoxuzoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=lego+batman+dc+super+heroes+free+download+for+androidPDF link annotation
    • 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_off0000c863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 17364 bytes
SHA-256: d458cfe3ff983d275a9ca0cc3830f60677ff6decd245926af11cf502565eca70