Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e531e1e7d86b0e…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 14:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b1b008c6ef7a0dceaa5eef6dc33b5efe SHA-1: 898921721087e89ecc1672cec72078f392d0f182 SHA-256: b6e531e1e7d86b0e13af30c1e9066b1aeadf8f15d32721fc236c8783ad706aae
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as "game hacks" or "free generators." The document body and heuristics indicate a lure to click these links, which likely leads to further malicious content or scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/406889139/coin-master-100-spin-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-map_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn 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
font_00_sfnt_off00005327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5327 24292 bytes
SHA-256: 665a3b9e5c293cbef7b287063b9959cbe75d2c81b8c8c17bbd6773ab87abeba8
font_01_sfnt_off00008a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1A 2884 bytes
SHA-256: 678d7d160b7643e846db78f399167b18b196c803f3d8f1e68c2e0b9c867f94e3
font_02_sfnt_off000093f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F9 18000 bytes
SHA-256: 01f803363f7eeb4dce0f816621254ac49837589185e144589db73f807fad6798

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