Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3f1f5a0592c049…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 22:54:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a039883c8d7af827555fc74e70caa60 SHA-1: 54cc99cb079314924c474a20047b8cf0bdf30ed9 SHA-256: ac3f1f5a0592c0493462336c5fdcab16ee2f56980bcf2ff4545d0e246c93bd23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a generator for game hacks and free currency. The document body and embedded links suggest a phishing or scam attempt to lure users to malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-apple-game-hack In PDF document text
    • http://repository.poliven.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/100-hack-coin-master_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
stream_003_off00004abc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABC 24240 bytes
SHA-256: 5eb6ee0c9404de3fb242c428a9303482f15baca29a0759ef706847cffcbf99d0
font_01_sfnt_off000081b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 17960 bytes
SHA-256: 436eaa300ecb98e79430677b69defb92df5311e4df3c2f37f833906bb9b7ba97

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