Malicious PDF — malware analysis report

Static analysis result for SHA-256 646fbdb4184f4333…

MALICIOUS

PDF

46.3 KB Created: 2021-06-08 13:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 01ca0e1a3a4dd9e03fb2f3d0692c435f SHA-1: abf74b506b59d0bbfb74dacf8f50031ff690795b SHA-256: 646fbdb4184f4333c388fb043ab9c1a467975af252ed6560201025c14f77dbb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and free in-game currency. The heuristic firings confirm the presence of malicious redirector links and a lure for free generators. While no scripts were directly extracted, the PDF structure and embedded links suggest a workflow designed to lead the user to potentially malicious content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/btool-hacks-roblox-game-hack In PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/hacker-hangout-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-non-virus-recorder-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-roblox-items-in-catalog_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/is-roblox-giving-away-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-hack-mo_GM431946152.pdfIn PDF document text
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D4 26732 bytes
SHA-256: df514d030ccec8cb36621f256f2f6a11d686be7fb1ad3b3ddcda316a1a3c8f02
font_01_sfnt_off00009269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9269 18284 bytes
SHA-256: 14ff48114c3feaa244048f7de317eeab17abb46cbd8fd8b1b1ceebde1c2066c5

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