Malicious PDF — malware analysis report

Static analysis result for SHA-256 f070a5d02699a18c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 10:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8e38c7698749956e12e820902aa229eb SHA-1: 09b24986de36e4afc7d4e95656a5fce1fb198cf0 SHA-256: f070a5d02699a18c46e8778606e993e83c74acd03e376ba378a27037d86bcc0c
220 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game resources and hacks to trick users into clicking malicious links. It contains numerous links to redirector infrastructure and SEO link farms, designed to lead users to potentially harmful content or further malicious downloads. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-2021-game-hack In PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ayobali.id/new/public/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.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_off000049a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A0 24952 bytes
SHA-256: 8827f333cf2616172e6f84d0b8eb351cfae7bf56dad95f395816d83b825bd7f0
font_01_sfnt_off00008227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8227 18880 bytes
SHA-256: 4ccb81aabfc378a65bbb004da1df6276046c1b1923188410bd025f5007717b79

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