Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcda82308cc39f29…

MALICIOUS

PDF

46.0 KB Created: 2021-06-09 07:46:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b35099d0c636842834687bd633ae8f1b SHA-1: 5a5abb5f382ce90845cee474fc470e2b5558a1f2 SHA-256: dcda82308cc39f29068981c6391fba06904e789563a9825bd1c428e5a1045951
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing and a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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: https://netcdn.tw/app/431946152/how-to-get-free-robux-in-1-second-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.tw/app/431946152/how-to-get-free-robux-in-1-second-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-tiktok-engagement_GM835599320.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pokmon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/download-to-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.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_off00005393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5393 26376 bytes
SHA-256: 05703d932be14fdf120e5ed0bfd53663e0855873b0318b8a0003199a22fe50fe
font_01_sfnt_off0000908b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908B 18560 bytes
SHA-256: 6d76c62fd27d1d7b5aefc75a4d3e424fafe037944cb1c07411fcfb792af6e64b

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