Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95489601fee1ab7…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 17:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c419d9295e75d9fc27b6a46a663ff502 SHA-1: 140470f24e911abe5104593c604e0c99879086d9 SHA-256: c95489601fee1ab728844a3e586b080cbe23e91e779fc51157e43d24a1dd5bea
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses 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 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.tw/app/406889139/hacks-for-coin-master-game-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coalesce-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-booga-booga-speed-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-free-robux-org_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-robux-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-gift-cards-list_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/dragonball-n-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-minifigures_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/denis-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-account-free-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-on-phone_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/claim-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000349e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349E 23136 bytes
SHA-256: 434bc4a9bf3bd002b58ffda54e14a5cdaa640eaea9b82a9e5108fec5620040a5
font_01_sfnt_off000068a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 18428 bytes
SHA-256: 3b81655d79e26380ef92b5d1af1222301b698fd41e2345ada85b37715d726562

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