Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e46e0ceab61c9a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 06:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8a7eec916f134956f183940221af6872 SHA-1: 92cdea0b6b59b98596459430dca836cb27e1f0cd SHA-256: d1e46e0ceab61c9a9fa8a207ca3a0d73bc46fe6cb78dfad44faebf0f354d1191
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to appear as game hacks and free currency generators, a common lure for phishing or malware distribution. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to PDF files hosted on asiasieja.pl, suggesting a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS score of 0.997 further supports its malicious nature. While no scripts were explicitly extracted, the embedded links and the nature of the lures strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/406889139/coin-master-game-free-spin-game-hack PDF link annotation
    • http://asiasieja.pl/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/robux-in_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 26788 bytes
SHA-256: eef40e4bcd3822ddceb4fc0cd5021308f9576bad8194680530812660fabc6c57
font_01_sfnt_off000083fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 18148 bytes
SHA-256: 504bf69ab615d46cf168ba32f934bf745dfb0b3d16564297e15ae7f7ea829546

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