Malicious PDF — malware analysis report

Static analysis result for SHA-256 532fc006812e7804…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 10:48:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9819d1106a4fe39998c7679035242ed3 SHA-1: d44163d9be4221cd5e3b0834d56e06118940515e SHA-256: 532fc006812e78042d92e5146a384e50caaa791d976a0a539f84ddc59f3d369a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as game hacks and generators. The heuristic firings indicate that the document links to known malicious redirector infrastructure and employs a lure for free game currency. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggest an attempt to drive users to a malicious site, likely for credential harvesting or further malware delivery.

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-heaven-free-daily-spins-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-boxing-simulator-2-cheat-engine_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/apx-roblox-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-decals_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-sign-up_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/bloxburg-on-roblox-for-free_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_off00002f6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6D 22544 bytes
SHA-256: 2e44877ad705924cc0d7258879dba46601da70f65885995d18bc5aad1a9b5e0f
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 18712 bytes
SHA-256: 22f9f04dd90852229df91ee75d6fdd29e265584f21e97447f92a46988bc6ec20

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