Malicious PDF — malware analysis report

Static analysis result for SHA-256 57db63dfdc2f6b01…

MALICIOUS

PDF

34.8 KB Created: 2021-07-08 00:43:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 805ed7ef767339639c79b723c5a23181 SHA-1: c92004608922f7b6bc9581dfa7c2658e2c2b81bb SHA-256: 57db63dfdc2f6b0128d0ff4d89a5b857355c698681946c2750757cf5d4b37823
200 Risk Score

Malware Insights

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

The PDF document contains multiple invisible links and visible text lures related to game hacks and free in-game currency, designed to entice users to click on malicious URLs. One of these URLs points to known malicious redirector infrastructure, suggesting the document is a lure for malware distribution or phishing. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful content.

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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/431946152/roblox-games-with-free-boombox-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/hack-dragon-ball-online-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-hack-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/raindrop-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pubg-uc-image_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-no-captcha_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/no-human-verification-coin-master-hack_GM406889139.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_off00002ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC1 22788 bytes
SHA-256: 9f79c1bc323a5090fea7726b4658a280b100245b197508b5328b8d0318276b3d
font_01_sfnt_off000061d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D2 19496 bytes
SHA-256: 1fe97cacaf87faaf7e87019df11dc5da97cf6ecddb8fd4c97aefa44281928813

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