Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a4928867b41213…

MALICIOUS

PDF

44.5 KB Created: 2021-05-13 11:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 924012475eb1b88880fbea276f2e7b19 SHA-1: b6412c6b51c23c77d1be34816a1ac7a35469a154 SHA-256: 57a4928867b412135649477c7416d3f0305a5bd127c1632c827ca3487b2f8fec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks. The primary lure URL is https://netcdn.xyz/app/406889139/hackear-coin-master-2021-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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/hackear-coin-master-2021-game-hack In PDF document text
    • http://jenne-technik.de/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://jenne-technik.de/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/i-robux_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://jenne-technik.de/images/coin-master-hack-no-human-verification_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_off00004904.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4904 24780 bytes
SHA-256: f5d2b20d84aa05929c4088f6826dadd66b51c876e65305ad9938d3e0bce2d1c4
font_01_sfnt_off0000821f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD0 18116 bytes
SHA-256: 835205c12f27628b43a9501073f928ecba08a070d1a79211f3098410d295e285

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