Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a9456d57c72639…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 09:06:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9d9475ae124e6aa92c2befd49c1f2a25 SHA-1: f3e2b8348bd8a1ee57a09d27f4547765a8b86118 SHA-256: 42a9456d57c72639e31cc126b22ee942640c4403e86f5ecdf087efb7ec1ac837
200 Risk Score

Malware Insights

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

This PDF document is designed to lure users into clicking a malicious link disguised as a "free generator / game hack". The document impersonates Facebook and directs users to a known malicious redirector infrastructure. The embedded URLs suggest a credential phishing or malware distribution attempt, likely related to game cheats or in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-spin-links-coin-master-october-30-2021-game-hack.
  • 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/406889139/free-spin-links-coin-master-october-30-2021-game-hack In PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.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_off00004cfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFB 23928 bytes
SHA-256: 737141d91cf4a7d73dc4b8c4972b1e88cb546b6f3d10a32a58471f912c669609
font_01_sfnt_off00008352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8352 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D04 18788 bytes
SHA-256: 87b86729e947f81c5a05c0b15119ec86872d8ed29c351927f1fec7084a910a19