Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adf133570eb5fe6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-08 00:00:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ccbdbe72d6896110ec9d14728d1e745e SHA-1: d18737309bafc5b2a6971e159530abab90368962 SHA-256: 3adf133570eb5fe6fec3fefd0e8572b7d875ccc029acd201009059d79ffa8327
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free currency generators. The primary lure is 'free Robux card codes' and similar offers for popular games. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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.tw/app/431946152/free-robux-card-codes-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-live-giveaway-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-ultimate-driving-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/impact-roblox-hack-website_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-change-your-robux-name-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/add-to-roblox-free-gear_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-custom-templates_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/accessory-wings-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 22136 bytes
SHA-256: 4ae021cf9994821905009b228112254cb43d346ca7ba26589b535c3f935dd6b5
font_01_sfnt_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 18888 bytes
SHA-256: 6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656

Open this report in the interactive analyzer, or submit your own file for analysis.