Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebd397f92151198…

MALICIOUS

PDF

32.2 KB Created: 2021-07-04 08:55:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8fdc43d000aca4e28dcad3cd7b71b373 SHA-1: e2fb22a9f8ff5324af7691d554c89dc6f53ed441 SHA-256: bebd397f9215119816666a79354217980be96b049cf80a2ba66d94b462e4241e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-free-school-game-hack. This indicates a social engineering tactic to lure users into potentially harmful websites. No scripts were extracted, but the embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-school-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/doomspire-brickbattle-hack-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-for-xbox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-google-play-free-items_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-week-2021-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-murder-mistery-radio-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-executor-201_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/groups-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/lrgit-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-for-completing-offers_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-anime-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-promo-generator_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/radgoll-hack-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-roblox-exploits_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
font_00_sfnt_off00002c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C48 21552 bytes
SHA-256: a07846635e47dd008918a11cac68d1a25abc07b2df96104be82f28651edc1d89
font_01_sfnt_off00005b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B55 18236 bytes
SHA-256: 5a6498f3f64aa35d42ea778cfda1642a5e2c3d59ef72b66b096602496afce130

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