Malicious PDF — malware analysis report

Static analysis result for SHA-256 51688e1b6647d9de…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 05:23:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 18232e6a8355efbac83d1e0eda32fe85 SHA-1: 41e92a011f43339fd356b2b1773d167a74aa45fb SHA-256: 51688e1b6647d9dea5ba5710a88a407fd9e00223eab645651f2ec90182ac51c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that lead to known malicious redirectors, masquerading as "free generator / game hack" lures. The document body and extracted URLs indicate a phishing attempt focused on in-game currency and hacks for popular games like Roblox and Coin Master. The primary goal appears to be directing users to potentially malicious websites that may host further lures or download unwanted software.

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/hacks-for-the-plaza-in-roblox-to-get-money-game-hack In PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-codes-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/pastebin-com-roblox-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/bloxburg-house-builders-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-crimson-winter-scarf-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/robux-para-roblox-gratis-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roblox-studio-blocks-addon_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-robux-for-free-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_off00002dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD2 21696 bytes
SHA-256: db8395142eaee88295aab78e836f1773b106a74bcd345d32c336c955dbdeebe8
font_01_sfnt_off00005dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 19700 bytes
SHA-256: 9a1e1d65de26def96b93d931077ee657efaeb1dad407c542448a47ca486b70e0

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