Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b62fe816b268c58…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 23:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cd6b0b372717aae01703bca8d534962f SHA-1: 352e417e3daa83a689538911df5d5ec34896dc96 SHA-256: 0b62fe816b268c58339672fc8231d8568c071cd2d4923e5486c8b75453b84d10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-no-verification-2021-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/free-robux-no-verification-2021-game-hack In PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/rbxfree-com-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/site-17-hack-roblox_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/dinosaur-simulator-roblox-dna-hack_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/roblox-rs-hack-download_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/roblox-free-codes-robux_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/rblx-gg-roblox-free_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/blakberry-hack-roblox_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/conseguir-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/roblox-hax_GM431946152.pdfIn PDF document text
    • http://el-ma.mtsn37jkt.sch.id/__statics/gudangsoal/files/free-robux-no-generator_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_off00002f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F22 22160 bytes
SHA-256: 6ee0fb6ffed259cdf91bf672f29e2d3da783784190568a68cebd13b568ba6274
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 19476 bytes
SHA-256: 0ea569e2458714af2fc88272f668bb9559ca065cecd410792851a624a05e4648

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