Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea5a10fa32ef7a2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 21:07:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 23ff686f25b7b1672ee028e22912d105 SHA-1: ec203beba10a80c3fc9f9edc354a624ac8e68131 SHA-256: 9ea5a10fa32ef7a2bfb3e983b29d347307ccb11acc2f4b23f82630c110bbeebe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The document body, though partially corrupted, contains text related to downloading game hacks and includes the primary malicious URL. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/how-to-download-wurst-game-hack In PDF document text
    • https://newenglandafs.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/rbxdemon_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/instantrobux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-download_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/what-is-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/hackear-coin-master-espaol_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
stream_003_off00004dce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DCE 24372 bytes
SHA-256: 2aaab4647f21ae1b293013350e3786a7cd56131d6316d24a3c092d04d04b07d7
font_01_sfnt_off000084f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F9 18508 bytes
SHA-256: 7549c5ff242de623ced2015b0eb416b949beaaafe418d998374bf37911f2b306

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