Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37d0f29e6b88295…

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 05:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 604b00c8cc1ac084d5aaa77ac4660b82 SHA-1: 3a42bbdf57215680f6d43c99feb1d956708bb255 SHA-256: e37d0f29e6b88295a45f61e7358234342b95f24afa9f73e0f174722d351e0742
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to redirect users to potentially malicious websites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-spin-link-today-free-game-hack In PDF document text
    • http://razredna-nastava.net/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-rewards_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/more-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/100-robux_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_003_off00004996.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4996 25152 bytes
SHA-256: 0e398f5628c255932af795f408e90422a0878e89a13090795d71eb886c9aa6e8
font_01_sfnt_off0000816f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 18412 bytes
SHA-256: 86b89ed3101a0e27da5923842e9624157784c801a06cd70b3b60dbae1592697c

Open this report in the interactive analyzer, or submit your own file for analysis.