Malicious PDF — malware analysis report

Static analysis result for SHA-256 f186659019566d7f…

MALICIOUS

PDF

54.6 KB Created: 2021-06-03 14:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 509a1423786ab37b88ada85c752b48cc SHA-1: 7af875b74301c14266cfcee4f9f1c9d08ab28bb3 SHA-256: f186659019566d7fbc7b13ffa00e0cff7631b47750a7e0a6403a21d982fa129d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary redirector URL is https://netcdn.online/app/479516143/minecraft-free-download-iphone-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious workflow designed to lead the user to harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9535

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.online/app/479516143/minecraft-free-download-iphone-game-hack In PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-pokemon-go-accounts-level-30-2021_GM1094591345.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://discord.ggIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D9 24808 bytes
SHA-256: 1460c0468f36000ef6e9c0ebd42a2deb9138bce097da74784a0242c946348c8a
font_01_sfnt_off00008a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 7936 bytes
SHA-256: 038829bc81e15b6024d2a75b24b2b95e916dd2d8797e4f87b867de59d61698ef
font_02_sfnt_off0000a350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA350 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DD 18632 bytes
SHA-256: 69c9e1d53de598faa7eba3c7e7e0e0cf5fcd320a3cd8fa35101ea10459ac0f9f

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