Malicious PDF — malware analysis report

Static analysis result for SHA-256 433c1aac328d5a92…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 02:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3ae42ca718fc41ebbb63eb5f9e4c1aa2 SHA-1: 757351b9c587c4059f532fa4ba78e57124aac02c SHA-256: 433c1aac328d5a92c7b8b8476f00220ca398318cdf705d000c7c2c6d664c91fc
160 Risk Score

Malware Insights

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

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' to lure users. The ML classifier strongly indicated maliciousness. The document's content and embedded links suggest an attempt to trick the user into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacker-clothing-roblox-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-coins-on-meep-city-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-how-to-cheat-the-disconnect-thing_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-free-yellow-team_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pubg-uc-18_GM1330123889.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/btool-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/comment-hack-roblox-en-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/my-roblox-account-has-beem-hacked_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-images_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.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
font_00_sfnt_off000031bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BF 22564 bytes
SHA-256: 1e448fb1572c2f1447b2197eef0633f0e58b3a3bfa8029155d1508fc1edecaae
font_01_sfnt_off0000640a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 19044 bytes
SHA-256: 1ae99be9240480d6726f5442aec13b76a565d2f0608dc130ac20eeee445f3a4b

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