Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a548c5308b346f8…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 22:29:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dd976e5d9dd4a4aa05d4886b077f2b55 SHA-1: 4d8497d20de544700eeaa0e341df6e926d5bdb83 SHA-256: 0a548c5308b346f89111ee7c1135d146b454750a9a7c4d41aac359f42169c36c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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/how-to-get-free-robux-generator-game-hack In PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/lazyblocks-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-june-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-34-4-hack_GM406889139.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_off0000323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323E 22112 bytes
SHA-256: b033cd100b491227d16e1d8951ca8402950e325184098f5f729f46b131f5da0d
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 18984 bytes
SHA-256: 9ace3a26ef8593b997a2527bb5fc552eafd0119b2772e901bbb9c059dfbe5502

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