Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4971cf3e233adb…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 15:06:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: adb9a577501e5743d87116c287c272ef SHA-1: 3e0286bb65e2c1a2fa2af12086fe9e919fc20982 SHA-256: 0e4971cf3e233adbd53454db1e17a6b0300c83794a2f2c801d18e35dc8af2d88
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links to malicious redirectors and IP-based URLs, such as http://110.232.83.89/slimsppks/repository/hack-coin-master-no-verification_GM406889139.pdf, which likely serve to deliver further malicious content or lead to phishing pages. The ML classifier strongly indicated maliciousness, supporting the observed redirection and IP-based links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-daily-spin-link-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-coin-master-no-verification_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-500-free-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
stream_003_off00004b95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B95 25128 bytes
SHA-256: 5ad25ed8bee009c1bc8416acb310d16c3e16176be90dbc7dbc1e05021bad4770
font_01_sfnt_off000084ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4D 18316 bytes
SHA-256: 5f3aa979c0c75b9e9bcded1c8d551e9f9e6ead33f385895e7850a31af22003f0

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