Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e1f5532e7054f8…

MALICIOUS

PDF

46.8 KB Created: 2021-06-04 00:39:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b785ca9d13939469e1092a08fb5e6f65 SHA-1: b8f65f4949600f191aff201ab3a010e008c2963f SHA-256: a5e1f5532e7054f8c21337fdea126ff558e7dede99687254e65d64a6a44bdb81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a heuristic firing for an external URI, suggesting it is designed to redirect users to download content. The document body, though heavily obfuscated, contains references to 'Coin Master Free Spin Bonus' and a URL that aligns with the heuristic findings, indicating a lure for potentially unwanted or malicious downloads. No scripts were extracted from this sample, but the presence of multiple suspicious URLs points towards a downloader or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-free-spin-bonus-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/robux-money_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-7km-egg-list_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/easy-points-gg_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_004_off000050fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FE 23972 bytes
SHA-256: 31087d8415bf889131fa214b1df8882fafd09c4dd03a1088efb038480515b166
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 3620 bytes
SHA-256: 1c6123b53d0b008bd76d56881717711c1a532303bb0233d9ea7cfdf27c93cf26
font_02_sfnt_off00009414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9414 18240 bytes
SHA-256: 56cae26c9e1a4b5919af4eab4714cc1a0c8bc5c343e04c4cbd8c5d1e26baf8dd

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