Malicious PDF — malware analysis report

Static analysis result for SHA-256 5576f95d1c24978a…

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 01:38:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ceed77b9fbfddc4776391c265e759ffd SHA-1: 41026b55ce9aaaba609aeaa12ed29f85f02ef93e SHA-256: 5576f95d1c24978a8ff4059caf9f35d589cf29582e4cf6464a41681b8c696307
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks and generators, but which redirect to malicious infrastructure. The document body and heuristics indicate a scam or phishing attempt, likely to deliver a secondary payload or lead to further malicious sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-strucid-roblox-aimbot-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/cheat-engine-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-your-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-high-school-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/youtube-hack-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-cheats-for-amazon-fire_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/shirt-creator-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-pc-game-free-download_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_off00002fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE4 22432 bytes
SHA-256: 40c595b80e657c515f48c38be95dccb33cfee868ad7ea50dd71e62a8563c6a3f
font_01_sfnt_off000061f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 19452 bytes
SHA-256: 68d8e56dc6bf000aba067d99366af8a935b54ed710815fa87890ea47d87432ae

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