Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a4ac86f437ead8…

MALICIOUS

PDF

49.3 KB Created: 2021-06-09 06:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5a21c907a2761ab19eeedd63c08a08d5 SHA-1: b1dd9c86604b79a43d3a709462c2e2e9c6a763ed SHA-256: 92a4ac86f437ead89b271693a027d00fe1d1c4a64673d05f4f3e963ac0dd20f8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading potentially malicious files, disguised as game hacks or cheats. The document leverages a known malicious redirector infrastructure and directs users to IP-based URLs, indicating a high likelihood of a malicious workflow. No scripts were extracted, but the embedded links and heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://netcdn.tw/app/431946152/free-robux-2021-android-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-apocalypse-rising-hack_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/hack-this-site-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-dragon-ball-z-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/tiktok-free-vpn_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/money-cheats-for-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/pokemon-go-free-lures_GM1094591345.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFF 27632 bytes
SHA-256: c924c4e0ebbd9c963a823deca70dde0ee42e190b430bb6909c73ac2dac5a41b5
font_01_sfnt_off00008ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF0 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C98 18712 bytes
SHA-256: 5b399b64a6b805f822f022eec8b2382b7783c9998cbf860711b208c97d3f2411

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