Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbccd6ea5d23303…

MALICIOUS

PDF

46.2 KB Created: 2021-05-14 15:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e9bebf26cae94cee0dffb9d9383c12eb SHA-1: b5beff026f7a52380a23fd10f33388f38c379a1b SHA-256: cfbccd6ea5d2330315af668be862baebfabce9b80e393551533296188dd2b444
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The heuristic firings confirm these links are associated with malicious redirectors and a lure for game-related exploits. Although no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/479516143/chisel-and-bits-mod-pe-game-hack In PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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_off00004e2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2F 25360 bytes
SHA-256: 7da4ad8eef2117c8b288aa61cdbde2ac3bb4c10785ee762e844bc5e315a123da
font_01_sfnt_off000087dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 3208 bytes
SHA-256: 4147f628371dcf7c73b490e8379d81d9d48baf71620b0aee12b3a28636177571
font_02_sfnt_off00009286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9286 18268 bytes
SHA-256: 21600419038eacf8d17a25e0de8b2d3f701338884b0b037dc932f5efdb40593c

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