Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd51a89ec2219567…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 22:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0a03c8de59f1d52094eba848a326c9c4 SHA-1: c17e794a287d0ad263745b60fef21f6b90fd07d9 SHA-256: bd51a89ec22195677515e5ba3670beb1584a4aa1157178d90d2e70f304d9208b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading game hacks or generators, with one primary link identified as a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of multiple malicious links and a high ML classifier score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/daily-coin-master-free-spin-apk-game-hack In PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/master-coin-free-link_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
stream_003_off00004d0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0D 24776 bytes
SHA-256: eed07777f8b67c6f95384861aaacce9ce5a6fcd133c8fc510501cc0b0fb73438
font_01_sfnt_off0000852f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 18476 bytes
SHA-256: f742b896080f556428e397b41111c37328508f14d40aa043f47df4a758656a88

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