Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fd5c3bc83115c7…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 06:56:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 547815b98e34a918827908acf27cbb57 SHA-1: 3476b22c81233414082143585939c9b028884a90 SHA-256: 26fd5c3bc83115c770a2bc60a46c46f1b4c8faf461f13b6d7d87e1d173140671
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as "free generator" or "game hack" lures. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

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.co/app/431946152/free-50-robux-gift-card-generator-game-hack In PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/roblox-base-wars-free-admin_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/prix-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-hack-vip-on-roblox-top-model_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-robux-stream_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_off000032e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E4 21868 bytes
SHA-256: a9ea14c3f86fbfb7b2eb847e1c3357621e86cbadd19b578b8cf809f3ee370817
font_01_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 19420 bytes
SHA-256: 73762fd33ebd878ad91aaaeeabb9436955b374e89c1ce6660066cc084899d3fb

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