Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea093f03400a2d94…

MALICIOUS

PDF

46.6 KB Created: 2021-05-11 06:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 926e3659b28562e05798bb9597a90de1 SHA-1: c65329c99550e13f7a43e7cb2bc4b71c46995cd2 SHA-256: ea093f03400a2d94434fa52cc76d46971940125ff096387558e572dfb81627e9
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free in-game currency, impersonating the Microsoft brand to trick users into clicking malicious links. The primary link, https://netcdn.xyz/app/431946152/how-to-hack-robux-game-hack, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to exploit user interest in free game items to facilitate credential phishing or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-hack-robux-game-hack.
  • 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/431946152/how-to-hack-robux-game-hack In PDF document text
    • https://dirigentigiustizia.it/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-roebucks-on-roblox_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_off000049d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D3 25980 bytes
SHA-256: 466befcd0b79bfdf28f4389dbc520c0d30159e334657f3e62259a24f774d587a
font_01_sfnt_off000085fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off00009323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9323 18412 bytes
SHA-256: 799ae8847f356c5b4d712fc876b96dd84d848442331064266ecb6e470ae97e62

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