Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a4b98d27f10553…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 18:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bd8df03aef077949b3c44977dfe12db3 SHA-1: 0a6ea749746015f9b443a4f645685e8ad4ca9e1a SHA-256: 83a4b98d27f10553c06e583e9a6509ad29f830d086c9a15f08eeea58e59dbfc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that promise game hacks and generators. The document body and heuristics indicate a lure to download or access content related to 'Coin Master Spin Hack Trick'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a potential for further malicious activity, such as downloading a second-stage payload.

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-hack-trick-game-hack In PDF document text
    • http://acktivities.com/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://acktivities.com/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://acktivities.com/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://acktivities.com/images/robuxy-com-free-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_off000049c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C4 25084 bytes
SHA-256: 62031fabb8effbd2d4fe794959883359d45b3dc750cf483855c365bb237beb99
font_01_sfnt_off0000839f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 17892 bytes
SHA-256: 4bfb4f0e693ff7770b94f95e309e8f86fd0b36da1cc4d74f533703e272a9a7c8

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