Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62db2b5ef063b1d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 15:20:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b528af8406b4f7f3f4603c574688deb4 SHA-1: dc1d36f123602e05ed3b59b97dd1e23e7182b7c5 SHA-256: f62db2b5ef063b1d57daef8a2e3d142d207a4e445882533e7d5c87b98ec629e3
180 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic firings indicate these links are designed to lure users into clicking, likely leading to further malicious downloads or exploits. The document body and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.co/app/431946152/blue-roblox-hack-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-weapon-cheat-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-any-roblox-account-using-a-program_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/tiktok-free-package-dialog_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pokemon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-in-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000325f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325F 22580 bytes
SHA-256: 05145bfeae80334c6d5f104490707421829997aa540d59fa4f1876190eda2b3d
font_01_sfnt_off000064a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 18796 bytes
SHA-256: 7d6b673be22dd9c8d1fa1412effdd9b404e4f15194efb9180c887a7a98dc0067

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