Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e655c8781cfef4…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 03:56:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b930012f66192e24171907c619107638 SHA-1: 3095f2424223f8762b71bfc6fbf46f90e6e34319 SHA-256: 39e655c8781cfef4ea8cc4a479608a47e64ac8399e004504264f2e115c8a6b99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple embedded links, including one pointing to the malicious redirector infrastructure at 'https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack'. The presence of a visual download button and the ML classifier's high confidence score further support its malicious nature, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-free-spins-and-coins-link-haktuts-game-hack In PDF document text
    • http://stansabbiatura.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stansabbiatura.com/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://stansabbiatura.com/images/send-me-500-2021-spins_GM406889139.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_off00004965.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4965 25028 bytes
SHA-256: 0fb0d22ef5b8bdd37edde803a1680a6e4bb35318cd586e4f8960475e1fded859
font_01_sfnt_off0000831c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 2980 bytes
SHA-256: 66de8b3278b19ce338bd39d802648449c21b92b9d4364fab864b10a133f6b3de
font_02_sfnt_off00008d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D71 18372 bytes
SHA-256: d0160522c9507928c114f36e82183f3878c9bb5f52b4c502e96d0270f56f9c5a

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