Malicious PDF — malware analysis report

Static analysis result for SHA-256 067fb7bdaf0ee4cd…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 10:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 545679d14874f4cf8066289e81b01173 SHA-1: 36dec821fac5d72560bf9dbe2ebee636d58a593e SHA-256: 067fb7bdaf0ee4cd87de0e1eedfe10828e0b3f70e6569ffb1049626ffb8a0330
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' and 'game hacks' as a lure. The document body and heuristics confirm the presence of these deceptive links, indicating an attempt to trick users into visiting potentially harmful websites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links within the PDF.

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.online/app/431946152/free-robux-com-real-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-4all-cool-20219-uc_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-at-all_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_004_off00005463.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5463 28648 bytes
SHA-256: 5a7a19d987e02407231e02fd0953172f9dde44fc7d19c61b6df3ac1cad36eb85
font_01_sfnt_off000094e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E3 18576 bytes
SHA-256: a83edd52c2be056a67ce389c2e3103e44ea5f6bc4cdf4c28a35d8553f09f80ba

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