Malicious PDF — malware analysis report

Static analysis result for SHA-256 989833cbdeb3acb1…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 03:25:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0d94c4c7c0c299a907d9eb569a433102 SHA-1: 5f262096e64d3e0d8e69139b41f9a9f7da228500 SHA-256: 989833cbdeb3acb12bbcec9521ae9ad6eb212a89216260c0682aba6445a651b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The heuristic firings, particularly 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK', strongly indicate a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an intent to lead users to a compromised or malicious website, likely for further exploitation or malware delivery.

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/479516143/minecraft-cracked-client-game-hack In PDF document text
    • https://itv-grabungen.de/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-generator_GM431946152.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_off000049ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AD 25060 bytes
SHA-256: b8bc582fc48561ad4cf23f1f8bc74f52f5583328e720e3863999ab2234051737
font_01_sfnt_off0000833d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE 17988 bytes
SHA-256: 8f8aa581ebeb38dd1bd4a64c3ef23a23f4e2e211000db114f01af054f3e4f204

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