Malicious PDF — malware analysis report

Static analysis result for SHA-256 86aa91ab55c87fd0…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 04:08:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cb3a0724403a6ff38d4a00f047d17447 SHA-1: 08c946412088697afefe1f3d4ff8dae928509418 SHA-256: 86aa91ab55c87fd09e95bace08ef649c4c32fcbff802c96a93e602a079d3228f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spins-and-coins-daily-game-hack In PDF document text
    • http://bf-sozidanie.ru/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bf-sozidanie.ru/images/village-coin_GM406889139.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_off00004885.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4885 24932 bytes
SHA-256: 0ddc2dbf19c7f2ee04e35bb2bec355143f6ccd116324953aa84e731fd7802c01
font_01_sfnt_off00008131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8131 18480 bytes
SHA-256: e9052e0f9c593188345ba389179451ef12c6c6a401d56a628cce0964dfd3917c

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