Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a22df884fa55ee4…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 11:21:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 17ef70152acc4b09dd8833c2b89f9384 SHA-1: 45004611359b428a9dcb24592008f761dd1cc7a9 SHA-256: 4a22df884fa55ee42bafddb2c8c02224e77874f4e50902d2f9209364edf6c9af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a social engineering attempt to trick users into visiting a malicious URL, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the 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.tw/app/431946152/i-need-robux-game-hack In PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/how-to-become-a-bc-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/free-roblox-shirts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/roblox-security-code-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://elearning.mimsatuprob.sch.id/__statics/gudangsoal/files/minecraft-114-download_GM479516143.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_off0000339b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x339B 22584 bytes
SHA-256: 44e23fc0a2de9edeacdecc1b43e0f8f0aa11fc6f3fff659ecdc5df68ddf8bf09
font_01_sfnt_off000065ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EC 18728 bytes
SHA-256: 781b6f361de12558180ab6156a49b669cea89b8cb2b086f0d5291a085f2ed091

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