Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9dcc9901aaafa7…

MALICIOUS

PDF

62.4 KB Created: 2021-09-09 13:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d200f54163c48b8c191606c1b985ee20 SHA-1: 86ee05ac996fa2e4b56bd42688f6d0bf4912afbe SHA-256: ca9dcc9901aaafa7217077fb002a3a4d64f9ba0690edf6acec998a228f7887b4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm with many disposable hosts, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

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://retailcop.ca/files/miwumevalexinidakozokafe.pdf
    • http://ronaldtan.nl/images/photo/nisimi.pdf
    • http://www.sas.edu.mn/ckfinder/userfiles/files/porejajitivuxofifususiso.pdf
    • http://alburigiott.it/userfiles/files/3862842795.pdf
    • http://kleni.cz/userfiles/file/lurafilatenagujepiw.pdf
    • http://aarogyamedico.com/userfiles/file/47390293653.pdf
    • http://benthanhsgfarm.com/images/uploads/files/31475599685.pdf
    • http://dtjxbpzx.com/filespath/files/20210908074945.pdf
    • https://sanaspinler.com/calisma2/files/uploads/resebakogipetifowitobujow.pdf
    • http://yucehukuk.com/resimler/files/mokogijinijibusali.pdf
    • http://pijntherapie.be/uploads/files/gevijegelom.pdf
    • https://mayphoviet.com/media/ftp/file/ludivufonado.pdf
    • https://ngonluathan.vn/images/ckeditor/files/22031741724.pdf
    • https://forexinc.ca/upload/editor/file/84422280603.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dfacafa2f---zuvuxagowilinagofixefiw.pdf
    • https://www.domosystem.gr/ckfinder/userfiles/files/65357066742.pdf
    • https://xn--90ah6akb9e.xn--p1ai/f/file/73615923337.pdf
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/52182105936.pdf
    • http://maksimetall.ru/files/94149719709.pdf
    • http://pm-ural.com/uploads/files/kanumozubejunevemusuvi.pdf
    • http://cmtl.in/uploads/userfiles/file/file/subuxijejegumiwe.pdf
    • https://artistaone.co/userfiles/files/99241468334.pdf
    • http://snuhonors.com/userfiles/file/varuxorijojinejafov.pdf
    • http://thegioixedap.net/upload/files/56407783117.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=walkie+talkie+app+android
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7f8.bin
f28ca9f49667880354bdd16ab56ed987226a2af9af72c000c3474a172442756f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F8 10304 bytes
font_01_sfnt_off0000cf42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF42 16792 bytes