Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed1700120b17bec…

MALICIOUS

PDF

47.7 KB Created: 2021-06-04 05:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 846056230d4c93d668310e592c1759d0 SHA-1: b8dfa3b0917b75baeafcba4e25f7ac97ca03c59d SHA-256: 8ed1700120b17bec2e41a0bc2800abc817eb28716f26f02fac8f8785360ba8f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks or generators, which is a common lure for phishing or malware distribution. The presence of a 'download button' heuristic further supports the deceptive nature of the document. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-laptop-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pokemon-go-free-gifts_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.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_off000052d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D1 25560 bytes
SHA-256: a544fc601870ee2996c1e22af90461e58898c0a483f18241265dfeb1dddeb805
font_01_sfnt_off00008ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 3128 bytes
SHA-256: e72d8d1e26c87a5aea965968b922732c7406bc33888678dc3a8c04cb95b3c770
font_02_sfnt_off00009721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9721 18464 bytes
SHA-256: 6197069052dd1f902b9484e0bf6d7537b85552f28950007395536a6c9025e818

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