Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5c401c0a17b6ae…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 10:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3a8ea88e104d0e7c2c8420c3ea8943cb SHA-1: 313919b7cea3e472dfb2fba1e0120e7a21096e02 SHA-256: 1b5c401c0a17b6aec324969a3d58ea907423423cb74d311058cb431a125a7cd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors, disguised as free game hacks or currency generators. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-pe-apk-free-download-game-hack` is specifically flagged as a lure for game hacks. The presence of a visual download button and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/minecraft-pe-apk-free-download-game-hack In PDF document text
    • http://adravietnam.org/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_off0000499d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499D 24328 bytes
SHA-256: 8ece687722160db80fd68e318b092c5c2726b6eac5046dfa708afc595385a567
font_01_sfnt_off0000813b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADB 18788 bytes
SHA-256: 56ecf13b7fdae58d5e4afb69efa7bdb7b8d9a7a0932eb3c661bed49813117ab2