Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0c58d19f4a02cc…

MALICIOUS

PDF

50.6 KB Created: 2021-06-11 07:10:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7011e81b0a4dc7472a148a92b5eaeb08 SHA-1: 0f45da5e8d51068a0dcbf04ec689df34d793b091 SHA-256: ac0c58d19f4a02ccbeacf59815a6fe6ede3a0d80a398ae362e71d9a97fed92a3
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 'Roblox hacks' and 'free generators' to trick users into clicking embedded links. The primary link directs to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document's content and embedded links suggest an attempt to exploit user interest in online games for malicious purposes, potentially leading to credential phishing or the download of additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/roblox-hide-and-seek-hacks-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.tw/app/431946152/roblox-hide-and-seek-hacks-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/pokemon-go-free-pokemon-generator_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-alt-delete-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/slurp-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-adidas-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/legit-coin-master-hack-no-human-verification_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_004_off00005319.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5319 28980 bytes
SHA-256: 1693fba061acfb526afd7b6461c3ea3ee089cb99cc1c3bcd17aea79892ddcfdc
font_01_sfnt_off00009607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9607 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000a2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AE 18476 bytes
SHA-256: ef4c141356614f09a58bc0c683f964e56e06196ca870d57ba3f0e63272bace20

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