Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ba79f54f551665…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 16:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 977f97aeff54cc952515f98dc164044f SHA-1: a0803646beb85e9fa1128887830196bd93e87ee1 SHA-256: 43ba79f54f551665974f4f64630ecfcda5cea4b0f06e6afa712000a332362909
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The primary malicious URL identified is https://netcdn.online/app/406889139/coinmaster-fan-page-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coinmaster-fan-page-game-hack In PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://elearning.man2modelmedan.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.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
stream_004_off000053ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EC 25412 bytes
SHA-256: 811c365b25dce36a7a6d0c9007e2ffab3ad48636664256c78a931b1c68297ab0
font_01_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 18412 bytes
SHA-256: 362c1088091ca1acb0efc5884e6feebbf648ceeb811ef0e2358676d84db8b2fd

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