Malicious PDF — malware analysis report

Static analysis result for SHA-256 513c4b0e59b232b1…

MALICIOUS

PDF

36.3 KB Created: 2021-06-18 01:28:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0ae6c112ec42380119a4835467bd0112 SHA-1: 204cf3da740ea0fe588b96723aa4e72d06c37899 SHA-256: 513c4b0e59b232b1db53943baed2f29fb325cf5d5a45fad9711a16ed82d65151
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically designed to lure users with promises of free in-game currency or hacks. The heuristic firings confirm the presence of malicious redirector links and a game hack lure. While no scripts were extracted, the embedded URLs and the document's deceptive content strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-1-million-robux-for-free-2021-game-hack In PDF document text
    • http://www.remiauclair.fr/images/hackear-roblox-robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.remiauclair.fr/images/roblox-free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/can-you-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://www.remiauclair.fr/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.remiauclair.fr/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.remiauclair.fr/images/pubg-30-uc-buy_GM1330123889.pdfIn PDF document text
    • http://www.remiauclair.fr/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.remiauclair.fr/images/free-robux-com-real_GM431946152.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
font_00_sfnt_off0000343a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343A 22900 bytes
SHA-256: b21d5823f191dae788ac41c405c4a80c0c2a3396fc7759145fa4d0aa804f76ce
font_01_sfnt_off0000672e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 19588 bytes
SHA-256: eff911e66e4092b4594545f60f0c6ed3dfd822edf2b58caf87a620a1c66fef8e

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