Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f59acbb4722efb…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 15:46:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7a849c3c5f36334aad6e7648ece950c4 SHA-1: 56cef3e106a7df1e8328c7a7799bbc8cb38dbdd1 SHA-256: c4f59acbb4722efb3800fd46e6c9dcc1996d23ef88e0958725e4bc9b92678299
220 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free generators to entice users. It contains numerous links to external PDFs and a primary malicious redirector at http://netcdn.tw/app/406889139/haktuts-coin-master-hack-game-hack. The document's structure and embedded links suggest it is part of a campaign to drive traffic to potentially malicious sites, likely for further exploitation or phishing.

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/406889139/haktuts-coin-master-hack-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-use-hacks-on-roblox-pet-sim-2_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-in-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-ro-ghoul-free-vip-server_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-shades-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-get-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/cheat-engine-roblox-2021-august_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-free-builders-club-membership_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-2021_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
font_00_sfnt_off0000322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322C 23320 bytes
SHA-256: 23a04023c419a218a1c729909b261968cf3f86b8190471a679b58b58c0f296b9
font_01_sfnt_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 18144 bytes
SHA-256: 7af4f5aa78d431c9967afade13530042deab11371d440c57f3259e725ceeac7b

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