Malicious PDF — malware analysis report

Static analysis result for SHA-256 1146603f3f522bbc…

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 20:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 05513280ef9c1622c6b10c45613ae56c SHA-1: 51263529c7080f74a066e2836b7dd671b14f2869 SHA-256: 1146603f3f522bbc7ca6d4cea89e274c2c460f535402228f6940a638af1051e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one that redirects to known malicious infrastructure. The document body and heuristics suggest a lure for game-related cheats or generators, likely intended to trick users into downloading further malware. No scripts were extracted, but the presence of malicious redirectors and the lure pattern indicate a high likelihood of a phishing or malware distribution attempt.

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/mcpe-client-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-free-draw-bot_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-for-rpg-world-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-elemental-wars-hack-script_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/redline-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/jailbreak-roblox-free-money-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/pubg-uc-xda_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-human-verification-2021_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_off0000317a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317A 22440 bytes
SHA-256: 448c38e801d017165c443339a11ff372025e063210eb88982c308ab27520c49a
font_01_sfnt_off00006350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6350 18108 bytes
SHA-256: c8b0b382a945d42a24ee610046caad250b3fa0bd75413a760b577ee3708e89f2

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