Malicious PDF — malware analysis report

Static analysis result for SHA-256 707293c4535821a3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 23:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f43848d13fa4216d647b47c8c1082f9 SHA-1: 79bcc6b7a829e5aeb635a0a7841b2f2355ce9fff SHA-256: 707293c4535821a36667330d5b84e6b35d55d2bc288ba5758bfd94997c2a51a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spins' and game hacks. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which ultimately leads to a malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/coin-master-free-spins-23-march-2021-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/cross-site-scripting-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-logo_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-api_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-free-builders-club-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-packages-on-roblox-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
stream_002_off00002f9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F9C 23020 bytes
SHA-256: 0d3ebeed6f1a9f84f4b4379d0bc35319ecb5a4f4cb0b87e5a009c63c697acbf8
font_01_sfnt_off00006384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 18916 bytes
SHA-256: 008a1dada2030376c016ae30411f6d2bb685e8d12afdbcca1e7bec21a4d131df

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