Malicious PDF — malware analysis report

Static analysis result for SHA-256 8899111c8677e5b5…

MALICIOUS

PDF

46.8 KB Created: 2021-05-15 22:30:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 58a812b984990fcc63007d24696b34dd SHA-1: b4f84f0b326700af40fbc0a0e894d7c587bcc9d9 SHA-256: 8899111c8677e5b5cfd12a51d508e080ef9b176b2f5bc4c3f0d7895680407c28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a "free unlimited Robux game hack" lure, indicating a phishing or scam attempt. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of malicious redirector links and the lure suggest the document's primary purpose is to drive users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/free-unlimited-robux-game-hack In PDF document text
    • http://dqdq.pl/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/free-robux-net_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://dqdq.pl/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF3 25500 bytes
SHA-256: 262656bfc74547833cd4187d420e59ce60545a5a46a81e126b682fc3ce6e550c
font_01_sfnt_off0000880e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 3084 bytes
SHA-256: 4889dc98a6bfd3c9244583f92387be58625a91e7a969778ad35ada89b27ed636
font_02_sfnt_off000092b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B4 18932 bytes
SHA-256: c9ac8ff14f07bfa737a68dd52966d36d325e06134ccd0dbc32924edcfa3e5a8c

Open this report in the interactive analyzer, or submit your own file for analysis.