Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba440ad8b70365d…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 12:29:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bd00e1d90effc3f2f2b134a9ba8992ec SHA-1: 7a3b8f4175539b845db9fbfec4d1cd5cd44bfe68 SHA-256: 2ba440ad8b70365d6efac852347a6ac2253b1d7a76332e7c81cc457355cf6f09
220 Risk Score

Malware Insights

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

This PDF document employs a lure of free in-game currency and hacks for popular games to trick users into clicking malicious links. The document contains numerous links to redirector infrastructure, such as http://netcdn.tw/app/431946152/roblox-group-free-robux-game-hack, which likely serves as a gateway to further malicious content or exploits. The presence of a visual download button and the overall SEO-optimized link farm structure suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-group-free-robux-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hacker-de-roblox-descargar_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-card-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/download-coin-master-apk-hacked_GM406889139.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_off00002d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D10 21452 bytes
SHA-256: 3d70299b2cf7079fe243eab79ca421447f26f9444d5d1027f07274878beecadc
font_01_sfnt_off00005be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 18968 bytes
SHA-256: f48b2ae17e84399e3a6b420fde02f8f729f2240ca84fd7cf9c0f4aab3f14a6ff

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