Malicious PDF — malware analysis report

Static analysis result for SHA-256 416ace2f6f8fec20…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 20:28:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f1188f5c82752c14d30948fd8dd4382 SHA-1: 1cfce9a612997cc694ccaa41bab71506727ee57c SHA-256: 416ace2f6f8fec208e39e0c6f9988e6f896132f85b2456182e642503c1bf9991
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting free game currency and hacks for popular games like Roblox and Coin Master. The primary lure is the promise of 'free Robux' or 'free spins', designed to entice users to click the malicious link. The document's structure and content strongly suggest a phishing or scam attempt, likely serving as a lure for further malware delivery or credential harvesting.

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/431946152/roblox36com-free-robux-game-hack In PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-hack-2021-acc-roblox_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/hack-para-roblox-final-stand_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-accounts-2021_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_off00002e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E30 22108 bytes
SHA-256: 45fdba8b0c2df659e1ab7276b08c9b4ad10c0dd379510d533dd2c085555e6345
font_01_sfnt_off00005f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 19392 bytes
SHA-256: f5d8fb1e1227d04f94fc2588cf3bb8579c3297dc080a6331d916c9c738f57d9e

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