Malicious PDF — malware analysis report

Static analysis result for SHA-256 847c26e14f258b9a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 23:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e519acf42df8c41c0dc2e99bf5474b3e SHA-1: 103047e61fbd97cae1d684455864812e0c9f0085 SHA-256: 847c26e14f258b9a4a42af25b59eb15dd8fdfb6d29c936ec7378955b7c759592
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking links related to game hacks and free in-game currency. It contains numerous links to redirectors and SEO link farms, indicating a phishing or scamming attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-spin-2912-2021-game-hack In PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-lumber-tycoon-2-teleport-hack_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/spin-hack-flight-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/pastebin-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-free-robux-100-working-2021_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-roblox-birthday-printables_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/gift-card-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-admin-hack-best_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/just-go-mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-100-spin_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_off00003113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3113 22992 bytes
SHA-256: 47444d43679592393decffcea0ba6ca00a77e84e785ddd62ffe0b0892ddc3797
font_01_sfnt_off00006479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 18740 bytes
SHA-256: cb73bff6aa8eacd336e20abf7182630e7bbae4421e0cba1737870e5649fd9a7b