Malicious PDF — malware analysis report

Static analysis result for SHA-256 0788e58bc94e8c68…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 20:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c7bef0c7a6bdae1a9c8e1f8f14eb4561 SHA-1: 7b10b6306339638bce07121d9d6994623fbe083c SHA-256: 0788e58bc94e8c68be6c510bc595c05738c4b904b068c835148248b3e0f4b526
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and 'game hacks'. The heuristic PDF_GAME_HACK_REDIRECT_LURE explicitly identifies this lure. The ML classifier also flagged the PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-robux-images-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/link-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/pokemon-go-windows-free-download_GM1094591345.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-2021_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_004_off000050f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F4 26128 bytes
SHA-256: 4a6fac7458e43025fab06d8780af87529797f0b29bebd884985fc8a40d88bcea
font_01_sfnt_off00008d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 18792 bytes
SHA-256: a2580c58451f3b1d88c8ceab1016c43f7244c9e681afad5968b7c22bbe0132ae

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