Malicious PDF — malware analysis report

Static analysis result for SHA-256 410fc551ffa51090…

MALICIOUS

PDF

49.3 KB Created: 2021-05-10 22:44:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d81cdd2416a47504d8c9ef275ba143d8 SHA-1: 72a3b16840e0ea29432618f31b0f9e1428e0152f SHA-256: 410fc551ffa5109020a91028d1c2766c08ac7095cc00a459654d690ebead4965
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into downloading potentially malicious files or visiting further compromised sites. No scripts were extracted, but the presence of malicious links and the ML classifier output indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/hack-coin-master-apk-game-hack In PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-today_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spin-ml_GM406889139.pdfIn 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_003_off00004c25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C25 25592 bytes
SHA-256: 93a7af3c88b2552462c8a3b7726f0c29db5a5571f7ef950189bf52ddac598919
font_01_sfnt_off000087a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A9 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000954a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x954A 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3A 17892 bytes
SHA-256: 9c4dada9bbcb376b19026f9d82cd29b1bcb88de2b1ea71a23b293af0df71213a

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