Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a1a19f6ae92ecc…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 06:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 453196852634043a5eb61c8a9f2be7cc SHA-1: 999edde62ba91a4008e0f6d23bc9d7395d388db3 SHA-256: f8a1a19f6ae92eccf0a7f73013537666825c78f48b120f703f47446283b05ace
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free Robux to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further PDF lures related to similar scam topics. The ML classifier strongly indicates maliciousness, and the document's content and linked URLs align with common phishing and scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/cool-minecraft-hacks-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-get-game-resources_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/robux-today_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-noclip-on-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-free-accessories-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/ben-10-roblox-free-games_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-birthday-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-spin-coin-master-link-2021_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_off00003743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3743 22792 bytes
SHA-256: 91b372eac7e64061a3973220cdeeec436474fbf1304c5403a4e2247fa1821807
font_01_sfnt_off000069da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 18240 bytes
SHA-256: 1c98bc36042c0615650adcd4002099b1bf58f46cf651dff08176303f69938fe5

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