Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17acd3bbe9edb19…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 00:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dd06bf099c3b82c902b708955f5532e6 SHA-1: e24749c1763a1bccf86652aff70803b1031ad685 SHA-256: b17acd3bbe9edb19d55326b062543d04d1e046729161bbffb71f1154ae6d02f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of these links and the lure content suggests a phishing or scam attempt, likely delivered as an attachment. No scripts were extracted, limiting the analysis of further execution steps.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/do-robux-generators-work-game-hack In PDF document text
    • http://library.umla.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/claim-gg-free-robux_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_004_off00004e6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E6F 25880 bytes
SHA-256: 4ff67d9917002e141afbeefc24019774b7042a505a75cd1fdc401f5622ad3a3a
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 18716 bytes
SHA-256: 15d5fba30c8516d3beee626d2c631839e0b4c71ce55e529ab3835fe2d3af584a

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