Malicious PDF — malware analysis report

Static analysis result for SHA-256 62becdd6bd2f69a5…

MALICIOUS

PDF

35.8 KB Created: 2021-06-18 07:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 37348c73eb3176a233c52b311f0608a6 SHA-1: 44eae69251cc9340264c41074d4ea52a48f107d0 SHA-256: 62becdd6bd2f69a51719e5db8c745f4f60581a795e4459a34da46be35b0eb874
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The ML classifier also flagged this PDF as malicious. The document body, though partially corrupted, contains similar thematic elements and URLs, reinforcing the lure.

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.co/app/431946152/welcome-to-roblox-building-hack-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-tower-battles-hack-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-december-2021-cheat-engine-speed_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-80-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spins-and-coins-2021_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_002_off000032ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EE 22568 bytes
SHA-256: 5cee667537fa738eb290cc2336c32aa1ad63bdd411215d0d32a17a16187817fc
font_01_sfnt_off00006564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 19548 bytes
SHA-256: a5193dc1e2aa88d8c5910f11dfbc7775fa7bc173ce9a4adc28baccd8ea244c5b