Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a71f9b8ccad93c6…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 16:19:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cb3bdf8c32a06458d3e898749e330e72 SHA-1: ab51f0c83b2122efc5863526ec5e23b96219adf2 SHA-256: 1a71f9b8ccad93c601b3d3d8d78c3e38e4182e8153d35247981fa74a3305ed1a
220 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, that promise game hacks and generators. These links likely lead to further malicious content or exploit kits. The document body and heuristics indicate a lure for free game-related items, aiming to trick users into navigating to potentially harmful sites.

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.tw/app/479516143/wurst-mc-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-cheat-in-roblox-basewars_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-how-to-get-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3003 22616 bytes
SHA-256: 9c5c3d8524c0318be87bd60d42f1b6a683b1e74cf0139f997cc96a7a6085b325
font_01_sfnt_off0000624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 18072 bytes
SHA-256: f2e49008d51297eeb1fc8be2ba2f15def21feb23153b94f58eb81aee8282afc5

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