Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e193590d7e4e81e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 16:39:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 886b08c17beeacdad28a785bda7e4f78 SHA-1: ba2fcf687747552400f87391d51a1ce6c1f5fb92 SHA-256: 6e193590d7e4e81e455ede0cb3d4f9877fcc04babef8a34cd964aebe0a7c2017
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector infrastructure, specifically advertising free game hacks and currency generators. The primary lure is 'free bling bling card coin master game hack' pointing to http://netcdn.tw/app/406889139/free-bling-bling-card-coin-master-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/406889139/free-bling-bling-card-coin-master-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-speed-hack-may-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/cheat-engine-roblox-this-game-has-shut-down_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-999999-robux-ios_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-speed-hack-2021-october_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-roblox-jailbreak-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-nintendo-switch-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-robux-ads_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-roblox-get-free-tix-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pubg-uc-voucher-code_GM1330123889.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_off00002fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 23400 bytes
SHA-256: a50d00635fc855938c93f04945afc5f674f7b9848fc546b1c8df46fe54292521
font_01_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 18464 bytes
SHA-256: 9e525174b91ad41fb891ac7cfc07bd8e8020f7e5e3866fd8c2d53bfbd1eafce6

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