Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f4fa97af793763…

MALICIOUS

PDF

46.3 KB Created: 2021-05-14 23:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a5949ecfc3673e29f999cb572add2545 SHA-1: 643dedb8f9ad98efdb29aef93a342f0886679347 SHA-256: b8f4fa97af793763beca125d061176ebfac990418abf689230f5fe3a8b49a558
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with game hack lures. The ML classifier also flagged this PDF as malicious. The presence of embedded links and the lure of "free generators" suggest an attempt to direct users to potentially harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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.xyz/app/406889139/coin-master-hack-pc-game-hack In PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-village-3_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 27416 bytes
SHA-256: 75e75dc30b02ba93436f435f44dceaf4d94eef33b03bdd5a58d548bd69eedf97
font_01_sfnt_off00008861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 3440 bytes
SHA-256: b8401986b530bb748715f403a036b6408862a720222eb6968fe21524df2dedac
font_02_sfnt_off000093c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C8 17868 bytes
SHA-256: 4813da8d3392ee5be528635b0fa067fda57eeb52b921389f98d36b8b85521abf

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