Malicious PDF — malware analysis report

Static analysis result for SHA-256 956b84d1d8ae3a08…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 19:01:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f74a632dc8fced17118fa6b084553027 SHA-1: 764fada38d40da02416d4a1cae65260b08723c2b SHA-256: 956b84d1d8ae3a087cc1f9b75577cee35e1503752f62813e2dbeff69a0045cc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam lure. The presence of embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-apk-mod-hack-download-game-hack In PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/mathep_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-spin-hack-no-verification_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_003_off000049bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BC 25436 bytes
SHA-256: a7686be5572359a7dedd0fa070b5f458215975127c744d597977241aa3ffb101
font_01_sfnt_off0000832b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 18472 bytes
SHA-256: 5bc0de2c636e77828c86a011ee4eef73512f75bfa2aaa85a990f8b4c327860b3

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