Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4f14ec5778c428…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 02:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3713719c2c0329b7ae276282dfd16af3 SHA-1: 6a61003071952d4de967a5e7507150fe9b62a82c SHA-256: dd4f14ec5778c428c2149eb2cedd683139cebbe797a553762121512672c400dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as a 'game hack' download. The document body, though heavily obfuscated, contains references to the same lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-version-download-game-hack, which is part of a chain leading to further malicious PDFs hosted on uo-nn.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-version-download-game-hack In PDF document text
    • http://uo-nn.ru/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B7 23844 bytes
SHA-256: e15c5d38fdd81ed218e00ad3ae01bbd0385f4028ccaf112aa16bbdac9ae7f66d
font_01_sfnt_off00007eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDA 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B60 18428 bytes
SHA-256: f912b3cee97859de3df5e35c061868833ee48e9318237c6af7b49665e28b08ba

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