Malicious PDF — malware analysis report

Static analysis result for SHA-256 678b4abec748266e…

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 03:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a080fcbe0d9b80f621289125e913f696 SHA-1: aa4d666db53189c1cf581591ed0019995db166a8 SHA-256: 678b4abec748266e0145823c1d5730433c95b6283000d0c20e057b2301541197
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free robux' to lure victims. The document body and heuristics indicate a clear intent to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/hack-roblox-200-game-hack In PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-do-you-hack-accouts-to-get-free-robux2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/cheat-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-cheat-trainer-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/appbounty-net-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hoe-to-grt-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/console-hack-robux-no-subscribe-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/pokemon-go-free-0-iv_GM1094591345.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-hack-online_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/descargar-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-accounts-without-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-card-codes-deutsch_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
stream_001_off00002b03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B03 22656 bytes
SHA-256: bd5601fdf71ed42ad1229b7ff78b9ca71b66520259218c1a63723fde9ed493f6
font_01_sfnt_off00005db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 18952 bytes
SHA-256: fc35751006a190de10059710bd57fb474587374ea71738395750fefacb33eb3e

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