Malicious PDF — malware analysis report

Static analysis result for SHA-256 804b091f57bad938…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 09:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc17054e2e139ce222018eabe2fdaf35 SHA-1: 3e2e89321257bd2a51e8126dedac0e279b078ebe SHA-256: 804b091f57bad938886e8d57045697a16a246e4edc02f11d1049ffa7c5062d3a
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. It contains a high number of embedded URLs pointing to a link farm, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5820

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://montaze.org/democms/userfiles/file/dopefimusafoxobomekakido.pdf In PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/xaligudovadun.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/womakugikedukabazilami.pdfIn PDF document text
    • https://uudanbury.life/files/file/13113093180.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/gusebazagirepajenolutizow.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/wejuxin.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/kelawifo.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/53979375407.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/jevobotajomikoregipew.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/fexekurulenisegekow.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/72881676618.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/75636389794.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rifabonopogowumogatuzav.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/vasagotipeluwugoxixeg.pdfIn PDF document text
    • https://bdata.vn/upload/files/sajufugovokafuzonalimil.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/60979929092.pdfIn PDF document text
    • https://urologasdainys.lt/userfiles/file/66493055295.pdfIn PDF document text
    • http://119pump.net/d/files/22233702723.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135008984251---fizadeko.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c0d398843---43381328026.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/33017893573.pdfIn PDF document text
    • http://arablift.net/userfiles/file/nabevopekakinurekumo.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210913150629.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/64146598536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fb+lite+app+download+latest+version+2019PDF 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_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 18824 bytes
SHA-256: 653c44ac014d423bfb76e222767b8f8e460b081ec5dcd1273e506215dca1e57e

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