Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7d186bdd84d292…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 16:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 662a2ae72ca8029e2a08742cc53a979e SHA-1: deb8506f157fd3246334425037763da7e2e2cb69 SHA-256: 2d7d186bdd84d292d1145e24ed051a0c93ad76edfdffd654108f4f66ceac9338
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/431946152/how-to-hack-and-get-free-robux-game-hack In PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/free-tiktok-coins-2021_GM835599320.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/cerberus-hack-program-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/how-do-you-hack-roblox-on-a-phone_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/big-brother-roblox-exploits-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/hack-roblox-2021-espaol_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/robux-for-free-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/robux-hack-generator-com_GM431946152.pdfIn PDF document text
    • https://elearning.manpaba.sch.id/__statics/gudangsoal/files/roblox-weapons-for-free_GM431946152.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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 22436 bytes
SHA-256: 991d0b0db7725837d25cbfc2235c992167268af20479674741b9118432f20044
font_01_sfnt_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 19328 bytes
SHA-256: 38bb1ef0d1232593bc33faeb07ab7c9da97d5775ca686b5d0190a8681bcdbe68

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