Malicious PDF — malware analysis report

Static analysis result for SHA-256 27af6482f7998327…

MALICIOUS

PDF

33.0 KB Created: 2021-06-28 03:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b53df3beef97ddf4b06782dccb815648 SHA-1: 36a32abb9531f60bd703eafce9afb427222da1be SHA-256: 27af6482f7998327e0245343fda79a25f7821eb45901a39d50af2dc265788e6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier flagging it as malicious support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-one-piece-pirates-wrath-hack-game-hack In PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-adopt-me-free-money-glitch_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/roblox-shopping-simulator-hack_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/hack-roblox-boxing-simulator-2_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/free-robux-earner_GM431946152.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsjeumalaamal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_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_off00002aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEE 21812 bytes
SHA-256: c04aa2f96c6e4f795b255dab8b489a2743c1d4eacddb6483370c242fe403050a
font_01_sfnt_off00005b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B26 19396 bytes
SHA-256: ec41b76c3ec759c4b96fca694fcbf98a401d1ef8b46a62e9381955501af7ff4a

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