Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc35d620e3c0810…

MALICIOUS

PDF

33.1 KB Created: 2021-06-26 14:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c33967fb3bc929d5955656a261b0ea24 SHA-1: 156c505b0f2f31fe46b01c8d63894803d736d5e8 SHA-256: 8bc35d620e3c0810e57bbbd0d6dcec95f89125ae03c9cb3f2c70c19adb66ac01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body explicitly mentions 'Free Tix And Robux 2021' and includes a call to action to access a 'ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-tix-and-robux-2021-game-hack In PDF document text
    • https://kimolos-link.gr/images/cheat-engine-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-robux-codes-august-2021_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/numeros-de-telefono-falsos-para-el-hack-de-roblox_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-cheat-seven-v2_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/corrupt-roblox-torso-free-servers_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/offers-for-free-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-hack-roblox-accounts-2021_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
font_00_sfnt_off00002a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4E 22132 bytes
SHA-256: 1abd874fc2d82c5445293dca2581f1c62abd55f02ab667c01e2ffa751c907251
font_01_sfnt_off00005b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D 19412 bytes
SHA-256: e53b0d84ae2ac9a49d9575a88aed524741942d6a771a80e1e0a3704efff11edd

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