Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0e5c4b3df4a4de…

MALICIOUS

PDF

50.5 KB Created: 2021-06-11 02:42:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 104ff514b5c4f3cf8ad108a10fd8d437 SHA-1: 0945789589a3ea3f1148d17393fa82fe041cb741 SHA-256: 7e0e5c4b3df4a4de618795ff7f9493ae71a5d91b3d0213683cda4517bc678201
240 Risk Score

Malware Insights

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

The PDF document employs a lure related to 'free stuff on game on Roblox' and impersonates Facebook to trick users into clicking a link. This link leads to a malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. The presence of a fake CAPTCHA further supports the intent to deceive the user into executing an action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-stuff-on-game-on-roblox-2021-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/free-stuff-on-game-on-roblox-2021-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-clothes-in-catalog_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-for-roblox-project-pokemon_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-hack-may-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-shower-simulator-cheats_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
font_00_sfnt_off0000554a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554A 27740 bytes
SHA-256: 0bfcbcab5b0719b8876d2c982daf9854ec9835130e1f2ff21f3bf7d2dc2349a1
font_01_sfnt_off000093a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A7 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA04F 19084 bytes
SHA-256: 92aed397413b04c0e8fa1e982b765c7fcfe371ac3b0010c1de302f3569d83265

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