Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a428f28f937871f…

MALICIOUS

PDF

42.7 KB Created: 2021-05-20 02:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1835991f626a3f7b0e4e095c30c82cc6 SHA-1: 366c4a2068b0a1d0456af7087ab5fef9cecd280e SHA-256: 1a428f28f937871f09bbc93e5f5295e4529f6c0dd3954f1d96e1a9b6a66bc348
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with one prominently leading to a malicious redirector disguised as a game hack generator. This suggests a social engineering lure to trick users into visiting potentially harmful websites. The presence of multiple links and the ML classifier's high confidence score indicate a deliberate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-cards-link-2021-game-hack In PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/weird-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/rbx-hut_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/body-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/pokemon-go-free-100-iv-map_GM1094591345.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
stream_003_off00004abc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABC 24916 bytes
SHA-256: a6bb125d31204b384ac175c72cb2da0941f8de4b30ee0667b3927f1d47b303da
font_01_sfnt_off000083d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D3 18456 bytes
SHA-256: b51790488d60a3c79421cfddad0a6ae9f074b26b8d27a704dda1d2d7bad48ec0

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