Malicious PDF — malware analysis report

Static analysis result for SHA-256 abff31049d734ef1…

MALICIOUS

PDF

36.0 KB Created: 2021-07-09 15:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 343ecdf107815a3701143898ff72fc3c SHA-1: ee9618f3c08371974b3c6ec472e47205d3f2ec1e SHA-256: abff31049d734ef1ba5f4b3439a1a96ed25fad78b838eb06b51caab9f23c3063
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link identified as a malicious redirector. This link, 'http://netcdn.tw/app/479516143/minecraft-dungeons-download-free-game-hack', is presented as a lure for a game hack generator. The presence of multiple similar links and the ML classifier's high confidence score indicate a malicious intent to redirect 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/minecraft-dungeons-download-free-game-hack In PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-account-hack-v3_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/best-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-bubblegum-free-dogcat_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-roblox-jailbreak-exploits_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/follower-generator-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/robux-quiz-free_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/boku-no-roblox-remasterd-hack-level-up_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-for-free-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/hacks-for-roblox-dead-locked_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-infinity-rpg-infinite-money-hack_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/hidden-code-in-inquisitor-master-video-for-free-robux_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
stream_002_off00003468.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3468 23228 bytes
SHA-256: 26422a41cd5d3d554b9d3ec59b00c8d74b31ae8b6e7badb6a4a83141128f2630
font_01_sfnt_off000068df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DF 18720 bytes
SHA-256: 921efc7a282f70be8e45d9f485508adcbd6bee6f34856fa33b0668efabfdb805

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