Malicious PDF — malware analysis report

Static analysis result for SHA-256 848d00e6b868051f…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 01:14:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4f41cba3a1d48f4720f62871218988f2 SHA-1: fecd6b78dfc907e7e36292aa6d7778a7f3885aec SHA-256: 848d00e6b868051fa4de2bc8e1f863a0efa16f3e483cd225c82fc7028f286f11
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to external sites, masquerading as "free generators" or "game hacks." The document body and heuristics indicate it functions as a redirector and part of an SEO link farm, likely to drive traffic to potentially malicious or scam-related content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-free-spins-link-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/pokemon-go-free-636_GM1094591345.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-free-co_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
stream_004_off0000523f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523F 25788 bytes
SHA-256: 7b18c70a833f3c9f8408d58187997f07b5cf1064475c07d49f4b3df1d84be44a
font_01_sfnt_off00008c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 18056 bytes
SHA-256: a4f33549350803e8a819cbfad6b4ff3cdc0b302ceab74af9f2f663eab6bd9ec0
font_02_sfnt_off0000ad98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD98 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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