Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed413b04e487c33…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 07:20:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 78d1f76e6383fc50e23338edf5b96f2e SHA-1: 0f2a0764812b5666185dae0a686306b33476bdde SHA-256: 1ed413b04e487c33ea5cfe7c75911456198b19e91c3c163553a227966ab09857
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a "free generator / game hack" lure. The document body, though partially obfuscated, also contains similar links and text suggesting a scam. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent, likely to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-to-get-free-robux-on-chromebook-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-2021_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
stream_004_off00004ffd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFD 25168 bytes
SHA-256: 5fed27271fe16765c72cf6a46b730cb229acde02a610d293edf5e24c6d9f0f51
font_01_sfnt_off00008a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 18880 bytes
SHA-256: cfbdee24d7402b99052158ce8ccd316620959aaec27a5d82eaae160d81e49f1b

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