Malicious PDF — malware analysis report

Static analysis result for SHA-256 544c347e369f8dae…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 15:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 507055f8bdfc3dc40fc39ba448096c24 SHA-1: f6234ef5814e9964c33a74bbc35482de158decca SHA-256: 544c347e369f8daead858bae45734881340de0db26d61067fb591c209b6cae26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of a visual download button further supports the deceptive nature of the document. While no scripts were extracted, the embedded URLs and the heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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/479516143/bad-minecraft-free-game-hack In PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-2021-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/comment-avoir-des-robux-gratuit-sur-roblox-2021-sans-hack_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-add-hacks-to-roblox_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/make-free-robux-com_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/works-how-to-get-free-robux-2021-fast-amp_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/youtube-how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://psb.sd-alazhar29.sch.id/repository/my-boyfriend-cheated-on-me-with-his-ex-roblox_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_off000032ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EE 22176 bytes
SHA-256: 2bd77588bfc4deb54a214543f10f19fd8ec079c908b3e890e6c50b564491c060
font_01_sfnt_off000063f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 18248 bytes
SHA-256: 4aba1dd6cc01965d6b6215da11c039b33948f2b192d52beaea5b71c00603ea7c