Malicious PDF — malware analysis report

Static analysis result for SHA-256 7669fb161571dc67…

MALICIOUS

PDF

44.1 KB Created: 2021-05-12 22:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4c2543010f894e2136df4fbbfd0bb5ea SHA-1: 57366436dad7f788adfd8454db156d2578f57d95 SHA-256: 7669fb161571dc678a9a214e8400f91ec0ddc4f536ea4037677a7e561fcc3640
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free spin generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-october-28-2021-coin-master-game-hack. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://netcdn.xyz/app/406889139/free-spins-october-28-2021-coin-master-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spins-without-human-verification_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
stream_003_off00004f73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F73 24972 bytes
SHA-256: bcf793bae2ad114843f1e0e9067af79bf9bd5210d6d3b75000c2e9edb75af8e0
font_01_sfnt_off000088e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 18656 bytes
SHA-256: ae43edb7d968773fa01f40288fe30e864a12c720900b1687a5763e30cc6382a2

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