Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac71fbeb4b16c09c…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 20:39:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0c0c1f5a77815148b4a82cf60d6599c9 SHA-1: 105f322f3d90e79614bee0c122b4e5c095223af9 SHA-256: ac71fbeb4b16c09c41a6f9eb1aa6825b9319f2e94f2318e63a357069b8668726
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector domains, masquerading as game hacks or generators, which is a common lure for phishing or malware distribution. The presence of a fake CAPTCHA heuristic further suggests an attempt to trick the user into performing an action that could lead to exploitation or further download. The document body confirms the lure by including URLs related to game cheats and generators.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-create-a-minecraft-server-for-free-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/tiktok-free-view-followers-app_GM835599320.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-catolog_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-ninja-legends-hack-script_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/edit-roblox-game-code-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-inspect-no-waiting_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-god-yourself-in-roblox-not-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/trolling-with-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-promo-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-pe-free-download-ios_GM479516143.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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 22016 bytes
SHA-256: 81ab22667b57986e2768c1898ef3acffa6161f82518e23e16bb9ce30e41fb0ef
font_01_sfnt_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 18276 bytes
SHA-256: 6ccfea5760c71d6df4ee421b3d45b23bb51577d79c71acde93037ba3fd9ba488

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