Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7dc0864aeeb0de…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 09:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2a3f9812f559c29ab15a13628d28dd8 SHA-1: 93602c7d94fca21896541490847a74caecba7815 SHA-256: ce7dc0864aeeb0dea91d09de56c51a2d567da6a5ff1e71e61d16fdf89cb6a4ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to a link farm, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the PDF is designed to redirect users through multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://jodhpurtravels.com/nbloom/fckuploads/file/sunesurisuzuwedumir.pdf In PDF document text
    • https://skvacations.com/userfiles/file/fabirunimelote.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/dodebo.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-11/images/files/99039898634.pdfIn PDF document text
    • http://cocoabuterol.com/upload/files/wipemidutixesorosesog.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/nirijemogitudafadumenaxib.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/wilomosikegegasisurinar.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/minobewafika.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/xuzodenalagupitipuvanetop.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/85107179373.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/nusovin.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/jasorura.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff1f2c6b2d---60412573269.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/68617053196.pdfIn PDF document text
    • http://ge-mak.com/files/panagurawuxanigo.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/fasuvotawixokutimisixigod.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/basaxatu.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcb3e248ad---liranedafasenipipo.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109101851524093.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/matakukir.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/riresawox.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/87594986345.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/43256040091.pdfIn PDF document text
    • https://j26clean.com/upload/files/gadanudax.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/19947721816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+copy+sms+from+phone+to+simPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 10728 bytes
SHA-256: de337a255785c83cdcde75bbeda7e54405403bee50556bfefa11e74edbfce863
font_02_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 17492 bytes
SHA-256: 4ef0b4f5edb121e864cbddf3fd4eb8724beee540b17868d173efc6903c070e66