Malicious PDF — malware analysis report

Static analysis result for SHA-256 2915a411929a11d2…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 16:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d77a78c2bd48b0e92574b25c294c611b SHA-1: 604ac763b54d22f2e561d6b9a50862d13ae77a05 SHA-256: 2915a411929a11d2bb8524a06df4c02bc68a12e5a874c9d4c3fb960abf317a50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators' for popular games. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further malware downloads or credential harvesting.

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/431946152/roblox-login-hack-game-hack In PDF document text
    • http://briankellyforcongress.com/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://briankellyforcongress.com/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://briankellyforcongress.com/images/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://briankellyforcongress.com/images/coin-master-unlimited-free-spins-link-2021_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_off00004a1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1A 24992 bytes
SHA-256: 0bf7192b6b6b00c7a85586ff4181b9b396aeae8ab80cde4c2aef0be8ab8cb40b
font_01_sfnt_off00008343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 18592 bytes
SHA-256: 4594c9d52aa6913ba89b547defae6e50b5d648d55ef93ab0faf484389542556d

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