Malicious PDF — malware analysis report

Static analysis result for SHA-256 2627821d5408db7b…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 10:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9344cafd4cb96471184377e5bb8a5956 SHA-1: cee0df3b8cf99b3ab49886b754a3f169e03d0e8a SHA-256: 2627821d5408db7b0c7932b0bf090e23e92fa36a780619ff4ff28e3b4ab22658
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to trick users into downloading further malware or visiting compromised sites. No scripts were extracted, but the presence of multiple malicious redirector links indicates a high likelihood of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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.xyz/app/406889139/get-free-coin-master-coins-game-hack In PDF document text
    • http://aessentia.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004506.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4506 23980 bytes
SHA-256: 57ba5e13c5290d8561d2bc8e0bd9d8b4790ac66970cd4a6008364d590a430e95
font_01_sfnt_off00007b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000857f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 17712 bytes
SHA-256: 21945d37724c890dd621455a00f6108c8bb3199d41d839a53701429653b6b663

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