Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2bf4c744fdbaf8…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 16:08:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 46433ff1c9d43ae80009893fbc3334a0 SHA-1: 0faf44badbf7ffba068d448ea2056c0e18620214 SHA-256: 4d2bf4c744fdbaf856d079bd7a409d72a36c589d99fe07e0dd51a05498420299
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game currency and hacks to entice users. It contains numerous links to external PDFs and a primary redirector URL, indicating a phishing or scam campaign. The ML classifier strongly supports its malicious nature, and the presence of multiple redirector links suggests a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-roblox-game-hack In PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/give-me-robux_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/lumber-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-on-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/roblox-prison-life-gui-hacks-pastebin_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/hacks-for-mibile-for-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-to-hack-for-more-cash-in-roblox-wizard-tycoon_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/roblox-hacks-get-free-robux_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/free-rememendem-toys-roblox_GM431946152.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://belajar.man2balangan.sch.id/__statics/gudangsoal/files/hacks-master-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
font_00_sfnt_off00002fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA2 22184 bytes
SHA-256: bf3a0800c2302413e73c0771f3d83548005f5936b03288603f2b63dea00b4a11
font_01_sfnt_off00006116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6116 18652 bytes
SHA-256: b1728457381e23f68e4ee3a23fe0db8d26bf6a44ba0a79ba7464eab7672fcd84

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