Malicious PDF — malware analysis report

Static analysis result for SHA-256 b644d996d95613ed…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 09:30:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a820161207320cf352a15c2c1c597693 SHA-1: 85b7d40b32333c28eb8a97c7b6319e5238d1fe4a SHA-256: b644d996d95613edc03f8118b54106e30e534cfe17594b009f33c994719a7244
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document utilizes a lure related to game hacks (Robux, Coin Master) to deceive users into clicking malicious links. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates that the links impersonate brands like Facebook, directing users to potentially malicious sites. The presence of XFA forms and embedded URIs suggests an attempt to exploit PDF vulnerabilities or deliver further malicious content, likely through a downloaded payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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: http://netcdn.co/app/431946152/robux-hack-for-robux-outrageous-bilders-club-game-hack.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/robux-hack-for-robux-outrageous-bilders-club-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-para-roblox-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-codes-for-free-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-in-one-second_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000335c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335C 22304 bytes
SHA-256: 9511089e25dc3c3974591326abe73365e536060aee4c807a54b7d4b721260a24
font_01_sfnt_off00006506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 19356 bytes
SHA-256: 07396eb9916d46fd96e9f9ee63d659f6eedb8cc974c816088958c59f5ff56fae

Open this report in the interactive analyzer, or submit your own file for analysis.