Malicious PDF — malware analysis report

Static analysis result for SHA-256 d960b82c33f5f055…

MALICIOUS

PDF

36.6 KB Created: 2021-07-06 13:23:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0cee9d0d8cd898983c5c9e6b32f7edf5 SHA-1: c18efb5ccb34b46cf046ae33c772b6b725222871 SHA-256: d960b82c33f5f0555283d0f03a2b5f045f5330b8211085776eb69ba5ed6f45dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, masquerading as a generator for free game currency and hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/coin-master-daily-free-spins-and-coins-2021-game-hack In PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-to-roblox-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/strucid-battle-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-so-you-can-get-robucks_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-robux-promo-coes_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/good-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/click-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-robux-codes-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtssadat.sch.id/__statics/gudangsoal/files/free-roblox-hacks-co_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_002_off000034c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C1 23388 bytes
SHA-256: c9a88cee42cf779ee1114ebffa0cfa6912fa3acf2d6fc1877f3b2ca0abf568f7
font_01_sfnt_off00006996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6996 19172 bytes
SHA-256: 7fcf2b3149a92e79ac9d712a22bcde278b2a62228781b2602f3810c9df92838d

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