Malicious PDF — malware analysis report

Static analysis result for SHA-256 607522b6be279e3c…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 11:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 77faedc4474d7f031426f2a3b076853a SHA-1: 6b370927a786e3cc025da166d978abfb98b761ef SHA-256: 607522b6be279e3c10ddb948ce088c16656c6f7cae2ef9fc45374bad509bbfcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by referencing 'free Robux' and 'game hacks'. While no scripts were extracted, the primary function appears to be directing users to a malicious URL under the guise of a game cheat, likely as part of a phishing or scam campaign.

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/431946152/robuxmatch-com-free-robux-game-hack In PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/inject-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-on-tablet-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/best-hack-script-pack-for-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-summoner-tycoon-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-anime-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-25-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-ios-2021_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_off00002f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F18 22480 bytes
SHA-256: 681f64b9a2183effa36079220e16c24641fd10bd946e09616a798b5b21529861
font_01_sfnt_off00006175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 19244 bytes
SHA-256: 4ad327823a1ecd3abfe961c49d13734587955ac9e5f3e77b093970b56673cf6a

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