Malicious PDF — malware analysis report

Static analysis result for SHA-256 e215a504303aac98…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 23:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b2c6a94c8f69167bcea5921dd474b8ac SHA-1: 495b2e9a5628cc91059a33fbc5831df895818c1e SHA-256: e215a504303aac98ab267e4b3ceba59a350aa09f4042091c9fa21c48428e9536
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'game hack' lure. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. This suggests the PDF is designed to trick users into visiting a malicious site that likely serves a secondary payload.

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/406889139/coin-master-heaven-free-spins-today-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-hacks-wurst_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_004_off00005182.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5182 24664 bytes
SHA-256: 94274819b93073e8995464aaa33ad721f582d1245768de63647de95ff4427ea3
font_01_sfnt_off00008937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 18356 bytes
SHA-256: 60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f

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