Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ea88778ac45539…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 14:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6f67f37c41c6e148b52bf0d272f82a52 SHA-1: f817e386a8863ab7d785732d0fc1732073467903 SHA-256: b6ea88778ac4553936226b7c4821fa6104aa0976b8e062a72fd99c99722fefe4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'http://netcdn.co/app/431946152/free-robux-codes-july-2021-game-hack', which is identified as a malicious redirector. The document body and embedded URLs suggest a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or malware delivery 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.co/app/431946152/free-robux-codes-july-2021-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pokemon-go-free-game-download_GM1094591345.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/code-roblox-tokyo-ghoul-2021-free-rc_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-ninja-magic-ninja-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/new-roblox-exploit-hack-proxo_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/all-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-nike-free-auttaucollant_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-para-teletransportarse-en-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-20210-robux-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/chams-hack-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/rolbox-hacks-for-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/redeem-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheat-engine-67-download-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/7-year-old-roblox_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_off00002f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F62 22092 bytes
SHA-256: 5e4dcae9ed13013215ba88fe3c096490a3ddc5a2eca3ba4598c52d24d5b3f6b1
font_01_sfnt_off00006073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6073 19712 bytes
SHA-256: 725a4dcb2c1654533971321855796fdd18b3941edc097389450cda0de23e32a7

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