Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c809a3ca767a92…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 08:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f266becf3ddf9e8848191665bbc23c10 SHA-1: 4743a2009de2f093e680dd19ebeb6279f64422e1 SHA-256: 24c809a3ca767a92b8223ce10ed6669bab34583206d909f0ef82291d37fe7466
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, that lead to pages offering game hacks and free items. The primary lure appears to be related to Roblox and Coin Master, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of embedded URLs and the nature of the lures strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/free-usaf-lackland-for-roblox-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-roblox-items-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-rc7-free-account_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/exploit-engine-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-giant-survival-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/claim-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_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
font_00_sfnt_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 22308 bytes
SHA-256: 5bbbd3b72440ce4113a489237be13dbc98d6cf39a3163e4afc81da62adc2b426
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 18996 bytes
SHA-256: d634f0d25a4122b56c1a25e2d76a2d5570f2edfb1ebff3587b5058f5185c9980

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