Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8b4c7b133a184a…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 22:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 35863599c05b06159c77486f21ac5894 SHA-1: fe64c36978af2513d89fabc29e0ad97753e9a5c3 SHA-256: 9b8b4c7b133a184a2d0d831603cb53b40ecd311afb30c71383fd4dc7493efca9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and free generators. The primary lure is the URL http://netcdn.tw/app/479516143/minecraft-hacks-pc-game-hack, which is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or scams.

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/479516143/minecraft-hacks-pc-game-hack In PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-on-xbox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/hack-roblox-egg-farm-simulator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/como-tener-robux-infinitos-sin-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-link-spin_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
font_00_sfnt_off00002e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E25 22212 bytes
SHA-256: 9a8cf05e9bf5652f47814b6d94e9f5d0a50387e5bdb8c8eb785c29f77e86ad41
font_01_sfnt_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 18180 bytes
SHA-256: 07b76f9baed0128e51c97dec540ec85ee324852e40b3966ddcd0b7b03af6c7e6

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