Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7770ca89939c33c…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 04:52:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5e9fc047283f559334e34e088fc551ca SHA-1: b52c8283a7d9557b5414d44f4da539bea38e0320 SHA-256: d7770ca89939c33cecb2be331ac8e1f1371eb740df4546f931efddf259bf7671
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free item generators. The primary lure is a link to 'coin-master-free-gold-cards-link-game-hack' which redirects to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-free-gold-cards-link-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-app_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/pubg-mobile-uc-xyz_GM1330123889.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-daily-free-spins-link-today-2021_GM406889139.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_004_off00004eba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EBA 26528 bytes
SHA-256: 6fbfa08dae442f202c0022feb12bcbd173f31838c7a34c6f55f753baef3e26f2
font_01_sfnt_off00008987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8987 18128 bytes
SHA-256: 70aaa51de045f356af96609cbefa464fa4c02188ab9d169d531121296ec6db77

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