Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d26db627d56c3b0…

MALICIOUS

PDF

33.4 KB Created: 2021-06-19 09:49:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5504f2b326f65240970ac22a2a1e916e SHA-1: a7848929ef3e03abdabfbea1d6f4c9ee3cae7a0c SHA-256: 3d26db627d56c3b0c8cd71ba4d3f5a540b21a1e0b6cfbe3404ae0bcecea6fd38
180 Risk Score

Malware Insights

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

This PDF document employs a lure of free game currency and hacks for popular games like Roblox and Coin Master. It contains multiple embedded URLs, including a known malicious redirector, that likely lead to further malicious content or malware downloads. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/how-to-get-free-money-on-roblox-jailbreak-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-hack-xyz_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/compte-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-credit-card-free-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-account-hack-v3_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-cafe-groups-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/happy-birthday-isabella-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cara-cheat-roblox-android_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/access-here-https-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-admin-panel-robux-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hole-in-the-wall-roblox-hack_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_off00002af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF1 22056 bytes
SHA-256: 7aec6f0565e6df9325bcead10a9f88c08601ee9bb8f2f85c9bbd3940d85e76b9
font_01_sfnt_off00005bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 19748 bytes
SHA-256: a38a5d5d31ce20cbc19c937e1ee284e54295f6db267a9b5c2018c82b93ddc110

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