Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f1ca81c513a2c0…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 05:53:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: af8731adaef4171162bee1808ea6d9d6 SHA-1: 55949fd1d36418433636e3b11e3f75e56af3bc01 SHA-256: 93f1ca81c513a2c0f02c69f5b4b3b70ff86c2bed7361f5ae27ef97ee9378856a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.tw/app/406889139/freecoins-game-hack, which is flagged as malicious. The presence of these lures and the malicious redirector strongly suggests an attempt to trick users into downloading or executing further malicious content, likely through a social engineering pretext.

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/406889139/freecoins-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-hack-roblox-to-get-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-roblox-membership-codes_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/claimrbx-free-robux_GM431946152.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_off0000301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301C 23128 bytes
SHA-256: df377b6707757e79c7add28607c082265a9eb90827de25d7795ad79ffdf75122
font_01_sfnt_off00006422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 17896 bytes
SHA-256: 95b27e0fe0f8d09f21308dfe7f1e0da3cbc5e6d7e802a0f52430e90404511a42

Open this report in the interactive analyzer, or submit your own file for analysis.