Malicious PDF — malware analysis report

Static analysis result for SHA-256 741bceec393b9796…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 07:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1e6193a4dfd970a4dba3d36a683a4f01 SHA-1: ff58cc7fb5ba850fd9db38aba26db870d72aaaac SHA-256: 741bceec393b9796e67313874bafeccf0d751222abe48473dbe1a768e7352f0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a website offering game hacks and free spins, a common lure for phishing or scam operations. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/daily-free-spins-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-often-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pokemon-go-free-98_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-pubg-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004de3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE3 28664 bytes
SHA-256: c0cd625293cdd0a42f20f71a38858878593f0833777f0398285fb33fbc2d2c62
font_01_sfnt_off00008faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAA 2912 bytes
SHA-256: 4d2d01e532dab87c93543525a5a2ee64da67df838e8d2c9aa435af102cbf2dac
font_02_sfnt_off000099ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99BA 18064 bytes
SHA-256: c13d24b09dacab53a31a9a34c8affe100c305689843df97e3c31ade46cbd1ed9

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