Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefd16b97b6db46c…

MALICIOUS

PDF

44.3 KB Created: 2021-05-14 12:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ff2406d8e7fddd2a89aa601934dbab55 SHA-1: 433fe6f683e290378e2766451f2386ddf9d127d8 SHA-256: eefd16b97b6db46cfbe735c0ac40764d0b15fe4366ad6e000b1313e29746b0e9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.xyz/app/431946152/hacked-roblox-accounts-list-game-hack PDF link annotation
    • http://jobsy.com.sg/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/spin-coin_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://jobsy.com.sg/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://jobsy.com.sg/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://jobsy.com.sg/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/roblox-promo-codes-free-robux_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_003_off00004857.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4857 28772 bytes
SHA-256: ab970d42465e1cb35ada3d7bf30d54515a4324e98317dc381c9b4964ccf58d07
font_01_sfnt_off00008972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 18720 bytes
SHA-256: 4364cdcc1b4e431b6a7cfc51a44ccbde59c7a972961f4ddbd0871ac7a20bc545

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