Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8134d1bec90332c…

MALICIOUS

PDF

46.6 KB Created: 2021-05-16 11:06:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 477789baebc1d83b2abe7bed75379df6 SHA-1: 71ccd1ec6cf1b7dbec10422fbacc31aabdeafc38 SHA-256: f8134d1bec90332c829b3ce96079be5e639559f99dcfd7bc7850352c4344107f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising "free Robux" or game hacks. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a lure for users to download or visit malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-robux-only-1-step-game-hack In PDF document text
    • http://www.teapotjewelry.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.teapotjewelry.com/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004886.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4886 26904 bytes
SHA-256: d54734ac4d00545fd9a93723175ed776e1ca2db1f91f4631ceb0c05156152568
font_01_sfnt_off000087cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CD 3096 bytes
SHA-256: d05729863dc05721ada29044278030255eeda038236568e8246a87d3a8573d6e
font_02_sfnt_off00009278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9278 18656 bytes
SHA-256: 070bf31dcf9002553526675ed1cd7b39f0747279791c235f0424fbc506b236c5

Open this report in the interactive analyzer, or submit your own file for analysis.