Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cd977d8e7bbd2d…

MALICIOUS

PDF

46.9 KB Created: 2021-05-14 12:56:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8531d68ee4a865aad5a5a5f83593a060 SHA-1: 1da9ed747588dd0144c948764940014163350068 SHA-256: f0cd977d8e7bbd2d2160aec9fd47dcd2e07892531f521d85bcdb17e2868c9c54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The ML classifier also flagged this PDF as malicious. The presence of these lures and the known malicious redirector infrastructure strongly suggests an attempt to trick users into visiting potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/blox-fun-info-game-hack In PDF document text
    • http://technologicalsc.com/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8B 28860 bytes
SHA-256: 3a364182821ac68f77da7b8165b449411f37207684cb3c45e2888c8d98a2fe55
font_01_sfnt_off00008c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C48 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000095f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F7 17928 bytes
SHA-256: 378f68af7bda96ca08821290e5d02393c78bb3c0fb942949d143c89702000491

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